Sickle Cell Disease
Description
Other Names
Hb S diseaseHemoglobin S disease
SCD (acronym)
Sickle cell disorders (a broad group of conditions that includes sickle cell anemia)
The convention for indicating the composition of hemoglobin types in the red cells of an individual is to use an acronym listing the types in decreasing proportion or amount. For example, sickle cell carrier (sickle cell trait), in which the amount of HB F (fetal) is greater than that of Hb A (adult), which is greater than that of Hb S (sickle), is designated as FAS.
Diagnosis Coding
D57.0x, Hb SS disease with crisis
D57.1, Sickle cell disease without crisis
D57.2xx, Sickle cell/Hb-C disease
D57.4xx, Sickle cell thalassemia
D57.8xx, Other sickle cell disorders
An "x" indicates the need or potential for additional digits to provide a more specific diagnosis. More coding details can be found at ICD-10 for Sickle Cell Disorders (icd10data.com).
Description
Sickle cell disease (SCD) is a group of inherited disorders that results from a genetic mutation in the beta-globin gene forming sickle hemoglobin, Hb S. Hb S polymerizes under deoxygenated conditions in red blood cells giving them an abnormal “sickle” shape.Amino Acid Sequence Ultimately Causing Sickle Cells
Prevalence
Sickle cell disease is the most common abnormality found in newborn screening programs. The incidence in African Americans of sickle trait is 1:14; sickle cell anemia is 1:396. [Lorey: 1996] The number of individuals with sickle cell disease in the United States may approach 100,000, even after accounting for the effect of early mortality on estimations. A paucity of high-quality data limits appropriate estimation. [Hassell: 2010]Genetics
Normal hemoglobin is composed of 2 alpha subunits and 2 beta subunits. Abnormal sickle hemoglobin is formed from a single point mutation in the beta globin gene, HBB, which results in substitution of valine for glutamine at position 6 on the beta helix. Sickle cell disease is inherited in an autosomal recessive manner when patients have 2 abnormal beta globin genes and at least 1 of the beta globin mutations is Hb S. Hb S can also be inherited with other mutations such as Hb C (Glu6Lys) or beta thalassemia, which have a sickle phenotype. The term sickle cell anemia is reserved for patients who are homozygous for the Hb S mutation. Sickle Cell Disease (GeneReviews) offers additional information.Prognosis
Several decades ago, the majority of individuals with sickle cell anemia died during childhood. However, with modern comprehensive care, newborn screening with early initiation of penicillin prophylaxis, improved immunizations, and use of hydroxyurea, children now live well into adulthood. The median life expectancy is 58 years for patients with Hb SS or sickle β0 thalassemia and 66 years for patients with Hb SC or sickle β+ thalassemia. [Elmariah: 2014]Roles Of The Medical Home
For the child with sickle cell disease, the medical home should manage well-child care, including standard childhood immunizations, acute illnesses unrelated to sickle cell-disease, and chronic comorbid conditions, such as asthma. Sickle cell-specific care (e.g., trans-cranial Doppler (TCD) evaluation, hydroxyurea) should be managed by a pediatric hematologist with experience in sickle cell comprehensive care. In locations remote from sickle cell specialty care, the medical home may also provide care for acute complications of sickle cell disease (e.g., febrile illness and mild pain crises) and laboratory monitoring for hydroxyurea. Comprehensive sickle cell care is multidisciplinary and the medical home plays an important role in helping to coordinate this care. The Sickle Cell Disease National Resource Directory (CDC) lists national agencies, specialty care centers, and community-based organizations that provide services and resources for people affected by sickle cell disease.Practice Guidelines
Yawn BP, Buchanan GR, Afenyi-Annan AN, Ballas SK, Hassell KL, James AH, Jordan L, Lanzkron SM, Lottenberg R, Savage WJ, Tanabe PJ, Ware RE, Murad MH, Goldsmith JC, Ortiz E, Fulwood R, Horton A, John-Sowah J.
Evidence-Based Management of Sickle Cell Disease: Expert Panel Report (
3.2 MB)
National Heart, Lung, and Blood Institute. 2014.
Summary guidelines (16 pages, subscription required) can be found at:
Yawn BP, Buchanan GR, Afenyi-Annan AN, Ballas SK, Hassell KL, James AH, Jordan L, Lanzkron SM, Lottenberg R, Savage WJ, Tanabe
PJ, Ware RE, Murad MH, Goldsmith JC, Ortiz E, Fulwood R, Horton A, John-Sowah J.
Management of sickle cell disease: summary of the 2014 evidence-based report by expert panel members.
JAMA.
2014;312(10):1033-48.
PubMed abstract
Helpful Articles
PubMed search for articles published in the last year about sickle cell disease in children
Ataga KI, Kutlar A, Kanter J, Liles D, Cancado R, Friedrisch J, Guthrie TH, Knight-Madden J, Alvarez OA, Gordeuk VR, Gualandro
S, Colella MP, Smith WR, Rollins SA, Stocker JW, Rother RP.
Crizanlizumab for the Prevention of Pain Crises in Sickle Cell Disease.
N Engl J Med.
2017;376(5):429-439.
PubMed abstract / Full Text
Ribeil JA, Hacein-Bey-Abina S, Payen E, Magnani A, Semeraro M, Magrin E, Caccavelli L, Neven B, Bourget P, El Nemer W, Bartolucci
P, Weber L, Puy H, Meritet JF, Grevent D, Beuzard Y, Chrétien S, Lefebvre T, Ross RW, Negre O, Veres G, Sandler L, Soni S,
de Montalembert M, Blanche S, Leboulch P, Cavazzana M.
Gene Therapy in a Patient with Sickle Cell Disease.
N Engl J Med.
2017;376(9):848-855.
PubMed abstract
Piel FB, Steinberg MH, Rees DC.
Sickle Cell Disease.
N Engl J Med.
2017;376(16):1561-1573.
PubMed abstract
Wang CJ, Kavanagh PL, Little AA, Holliman JB, Sprinz PG.
Quality-of-care indicators for children with sickle cell disease.
Pediatrics.
2011;128(3):484-93.
PubMed abstract
Clinical Assessment
Overview
Sickle cell disease is a multisystem disorder that can cause acute and chronic complications in nearly every organ system. Careful history and physical examination should focus on eliciting signs and symptoms of these complications or comorbid conditions.Pearls & Alerts
Pulse oximetry can underestimate oxygen saturationPulse oximetry is an inaccurate measurement and often underestimates oxygen saturation due to increased levels of carboxyhemoglobin and methemoglobin in patients with sickle cell disease.
Assessment of painChildren experiencing an acute vaso-occlusive pain crisis may not have changes in vital signs (tachycardia or hypertension). Assessment of pain should be based primarily on the patient’s subjective report.
Screening
For The Condition
Universal screening for sickle cell disease is conducted in all states as part of newborn screening programs. Hemoglobin separation techniques (e.g., isoelectric focusing, IEF) can identify infants with sickle trait (FAS), sickle cell disease or sickle β0 thalassemia (FS), sickle-Hb C (FSC), or sickle β+ thalassemia (FSA). If an abnormal newborn screen is obtained, repeat newborn screening should be sent in accordance with recommendations by the appropriate state newborn screening program. If the confirmatory testing is positive for homozygous sickle cell anemia or sickle β0 thalassemia, the patient should be referred to a pediatric hematologist with expertise in management of sickle cell disease and started on penicillin prophylaxis. Sickle Cell Disease provides additional information for response to a positive newborn screen.Of Family Members
Parents and partners of a parent of a child with sickle cell disease who are unaware of their carrier status should be screened with a hemoglobin electrophoresis for sickle trait, Hb C, or beta thalassemia so that appropriate genetic counselling may be provided about risks to future offspring.For Complications
Retinopathy: Annual to biennial screening for sickle retinopathy should be performed starting at age 10 years. Those with retinopathy should be referred to a retina specialist.Stroke risk: Measurement of cerebral blood flow velocities by transcutaneous Doppler ultrasonography should be conducted by those trained in the technique specific for sickle cell disease. Begin annual testing at age 2 and until age 16 to screen for elevated stroke risk requiring intervention with chronic transfusion therapy.
Pulmonary hypertension: Routine screening echocardiograms are no longer recommended in asymptomatic individuals; however, those with symptoms or signs should be referred for an echocardiogram.
Iron overload: Patients receiving chronic transfusion therapy are at risk for iron overload and should have screening MRIs for liver iron content at least annually.
Presentations
Infants are usually identified by newborn screening during the asymptomatic period. Prior to the advent of universal newborn screening, patients with the severe sickle cell genotypes would present initially with dactylitis of the hands or feet, severe illness including splenic sequestration or sepsis, or sudden death. Patients with more mild genotypes (e.g., Hb SC or sickle beta+ thalassemia) might present with unexplained recurrent pain as older adolescents or adults.The presentation of complications related to sickle cell disease depends on the organ system involved. Those with stroke will usually present acutely with a focal neurologic deficit, such as hemiparesis, aphasia or ataxia, depending on the anatomic location of the stroke. Depending on the severity or stage of sickle retinopathy, patients may present with spots in the field of vision (floaters), blurriness, decreased visual acuity, or visual field loss. Patients with pulmonary hypertension may present with exertional dyspnea or persistent hypoxia.
Diagnostic Criteria
Diagnosis is established by hemoglobin separation techniques, such as isoelectric focusing, high performance liquid chromatography, or hemoglobin electrophoresis.Clinical Classification
Sickle cell disease is a group of sickling disorders. There are a variety of genotypes and associated clinical phenotypes. The most common genotypes are summarized in the table below.Common Sickle Cell Genotypes
Differential Diagnosis
Differential diagnoses include:- Homozygous sickle cell anemia (Hb SS)
- Sickle-Hb C disease
- Sickle β0 thalassemia
- Sickle β+ thalassemia
- Sickle-Hb D disease
- Sickle-Hb E disease
- Other sickle syndromes
Comorbid Conditions
Commonly co-occurring conditions may include:- Asthma: Patients with uncontrolled asthma may have more frequent vaso-occlusive pain due to increased sickling with hypoxia.
- Sickle lung disease: Due to chronic sickling within the lung vasculature, patients develop obstructive, and then restrictive, changes in the lungs, which frequently leads to pulmonary hypertension and is the leading cause of death in adults with sickle cell disease.
- Stroke: Children with prior stroke may have residual neurologic deficits.
- Sickle nephropathy: Children with sickle cell disease can develop renal complications over time. This usually starts with urine concentrating defects (hyposthenuria) followed by glomerular hyperfiltration, proteinuria, and eventually focal segmental glomerulonephritis.
- Retinopathy: If untreated, sickling within the retinal vessels can cause proliferative retinopathy, hemorrhage within the retina, retinal detachment, and blindness.
- Osteonecrosis: Infarction of the bones can cause chronic severe pain and limitation in mobility.
History & Examination
Family History
Birth parents will have a sickle trait, Hb C trait, or beta thalassemia trait. Because universal newborn screening for this disease was not implemented prior to the last couple of decades, there may be history of family members who died during childhood, had frequent pain, stroke, or gallstones.Pregnancy Or Perinatal History
Pregnancy and birth history are usually normal since the predominant form of hemoglobin present in the fetus and newborn is unaffected fetal hemoglobin. It is possible if the parents were aware of their carrier status that chorionic villus sampling or amniocentesis was performed to establish prenatal diagnosis.Current And Past Medical History
It is important to understand the history of prior complications or other comorbid conditions. Knowledge of the frequency of vaso-occlusive crises and what medications work best for controlling pain can help with planning for treatment of future episodes. Patients with recurrent acute chest syndrome require additional long-term monitoring for development of chronic lung disease or pulmonary hypertension. Patients with a severe history of complications may need therapy with chronic transfusions or may qualify for bone marrow transplant.Developmental And Educational Progress
More than a quarter of children with sickle cell disease will experience a silent cerebral infarct by the age of 6 years. This number increases to 37% by 16 years of age. Silent cerebral infarcts are associated with decreased IQ and poor academic performance. [DeBaun: 2014] Referral to a sickle cell expert is recommended for those with silent infarct. Neuropsychiatric testing should be offered to at-risk patients and efforts should be made to ensure each child has an individualized education plan in place as appropriate.Maturational Progress
Pubertal development and growth are significantly delayed in patients with sickle cell disease. On average, puberty is delayed 1-2 years, and the median age at menarche for girls is 13.2 years. Skeletal age is delayed by 1.3 years in children between the ages of 10-15 years. [Zemel: 2007]Social And Family Functioning
Family structure should be determined and primary caregivers identified so that they may be educated about acute complications and instructed on the correct technique for splenic palpation. Assessment of family resources should include availability of transportation for appointments and acute visits, a working phone to schedule appointments, and the ability to obtain prescribed medications.Physical Exam
Vital Signs
Abnormalities in vital signs should prompt further evaluation. Hypertension is associated with increased risk of stroke and should be managed aggressively. Pulse oximetry is an inaccurate measurement and often underestimates oxygen saturation in patients with sickle cell disease due to increased levels of carboxyhemoglobin and methemoglobin. Tachypnea or hypoxia should prompt evaluation for acute chest syndrome. Tachycardia and hypertension are not universally present in patients experiencing acute vaso-occlusive pain crises.Growth Parameters
Children have a decreased growth velocity in proportion to the severity of their anemia.Skin
Chronic skin ulcers in the lower extremities can develop as a result of small vessel vaso-occlusion, vasoconstriction, decreased oxygenation of skin tissue, or infections.HEENT
Adenotonsillar hypertrophy may be a sign of obstructive sleep apnea. In patients with sickle cell disease, obstructive sleep apnea is associated with increased frequency of vaso-occlusive pain crises due to more frequent deoxygenation, which triggers red cell sickling. Children and adolescents with sickle cell disease have an increased risk of retinopathy and may have neovascularization or hemorrhage on retinal exam.Mouth/Teeth
Many children will require orthodontia due to maxillary protrusion secondary to compensatory bone marrow expansion (see all Orthodontics services providers (2) in our database).Chest
Tachypnea, retractions, decreased breath sounds, crackles, or wheezing should prompt evaluation for acute chest syndrome or reactive airway disease.Heart
Systolic flow murmurs may be present secondary to chronic anemia. An accentuated pulmonic component of the second heart sound or gallop can indicate development of pulmonary hypertension.Abdomen
Acute splenomegaly may indicate splenic sequestration crisis. Chronic splenomegaly may result in hypersplenism or put patients at risk for splenic rupture. Due to chronic hemolysis, there is an increased risk for cholelithiasis, which can manifest with a positive Murphy’s sign (hypersensitivity to deep palpation in the subcostal area when a patient with gallbladder disease takes a deep breath) or severe right upper quadrant tenderness.Genitalia
Males with sickle cell disease can develop priapism, a painful and prolonged erection. Delayed pubertal maturity is not uncommon.Extremities/Musculoskeletal
Limited range of motion with forced internal rotation of the left extremity or painful straight leg raise may be a sign of avascular necrosis of the femoral head. Avascular necrosis in the humeral head may cause similar symptoms in the shoulder. Point tenderness or swelling with fever can occur in the setting of osteomyelitis or bone infarction.Testing
Sensory Testing
All patients should receive dilated retinal examinations by an ophthalmologist to screen for sickle retinopathy starting at age 10 years. Any child receiving iron chelators should have ophthalmologic examinations yearly.Patients receiving iron chelation should have audiology screening yearly.
Laboratory Testing
Patients with sickle cell disease should have routine screening of kidney and liver function annually with bloodwork and urinalysis. Patients receiving hydroxyurea therapy on stable doses need complete blood counts performed every 3 months to monitor absolute neutrophil and platelet counts. A complete blood count including reticulocyte count should be obtained when children present with acute sickle-related complaints.Imaging
Children with Hb SS or sickle β0 thalassemia should receive annual screening with TCD starting at age 2 and continuing through age 16. The relative risk of stroke is 44 in children with abnormal velocities on TCD. [Adams: 1992] Screening with TCD or neuroimaging is not recommended in asymptomatic adults.Routine screening with echocardiograms is no longer recommended. Patients with new cardiopulmonary symptoms should receive an echocardiogram and be evaluated for asthma or other non-sickle-cell-disease conditions.
Patients receiving chronic transfusions should be screened annually with MRI for hepatic or cardiac siderosis to determine need for oral chelation therapy.
Genetic Testing
Genetic testing is available for mutations in the beta globin gene. Mutation testing may be sent to help distinguish between Hb SS and sickle β0 thalassemia. It can also be used in unusual cases with ambiguous electrophoretic patterns.Subspecialist Collaborations & Other Resources
Pediatric Ophthalmology (see Services below for relevant providers)
Refer for annual or bi-annual sickle retinopathy screening beginning at age 10.
Pediatric Pulmonology (see Services below for relevant providers)
Refer if there is a history of acute chest syndrome, reactive airway disease, or concern for obstructive sleep apnea.
Pediatric Cardiology (see Services below for relevant providers)
Refer for consideration of cardiac catheterization and management of pulmonary hypertension if TRV >3 m/s on echocardiogram.
Pediatric Neurology (see Services below for relevant providers)
Refer if there is a history of stroke, cerebral vasculopathy, or silent infarct.
Pediatric Genetic Counseling (see Services below for relevant providers)
Parents of childbearing age should receive genetic counseling regarding the risk of having another child with sickle cell disease.
Treatment & Management
Overview
The management of sickle cell disease focuses on primary and secondary prevention of complications as well as management of chronic comorbid conditions. The care of all patients with sickle cell disease should be directed/overseen by a clinic that specializes in that care and collaborates with primary care to assure high-quality comprehensive care. Distance from such a center may determine where key care components are delivered. The Sickle Cell Disease National Resource Directory (CDC) lists national agencies, specialty care centers, and community-based organizations that provide services and resources for people affected by sickle cell disease.Pearls & Alerts
L-glutamine for sickle cell disease treatmentThe FDA approved the use of L-glutamine powder (Endari) in July 2017 for patients age 5 years and older. It is an oral medication shown to decrease rates of acute chest syndrome, as well as frequency of hospitalization and length of stay for vaso-occlusive pain crises in patients who had 2 or more episodes of pain in the preceding year. It is the first drug to gain FDA-approval for sickle cell disease treatment in more than 2 decades.
Perioperative surgical managementUndergoing general anesthesia for surgical procedures increases the risk for development of acute chest syndrome of vaso-occlusive pain crisis. Preoperative simple or exchange transfusion has been demonstrated to minimize this risk.
How should common problems be managed differently in children with Sickle Cell Disease?
Viral Infections
Patients with sickle cell disease who test positive for influenza should be treated with a therapeutic course of oseltamivir.Bacterial Infections
Fever of 101ºF (≥38.3ºC) in a patient with sickle cell disease is a medical emergency. The clinician should urgently evaluate the patient, obtain blood cultures, and administer broad spectrum antibiotics (e.g., third-generation cephalosporin). Inpatient admission may be indicated if the patient is <1 years of age, incompletely vaccinated, noncompliant with penicillin prophylaxis, toxic-appearing, or has an elevated white blood count >30k or <5k. In the event of a positive blood culture, patients without adequate outpatient follow-up (e.g., no transportation or working phone) should be observed inpatient.Systems
Hematology/Oncology
Children with Hb SS disease or sickle β0 thalassemia should be started on penicillin prophylaxis at diagnosis to prevent pneumococcal sepsis. Prophylaxis may be discontinued at age 5 if there is no history of pneumococcal bacteremia or surgical splenectomy. [Falletta: 1995] All patients should complete a normal immunization series as well as additional meningococcal and pneumococcal vaccines as recommended by the most current version of the Centers for Disease Control and Prevention's Immunization Schedules (CDC).
The 2014 National Heart, Lung, and Blood Institute recommend that hydroxyurea therapy be offered to all patients with homozygous sickle cell anemia or sickle β0 thalassemia starting at 9 months of age regardless of prior complications or baseline fetal hemoglobin percentage. [Yawn: 2014] Hydroxyurea therapy has been shown to decrease frequency of vaso-occlusive pain crises, acute chest syndrome, and lifetime transfusion requirements, as well as increase life expectancy. [Steinberg: 2010] Hydroxyurea for Sickle Cell (Hospital for Sick Children) (
395 KB) is an information sheet for parents with children prescribed hydroxyurea (Hydrea).Hydroxyurea can cause depression of the absolute neutrophil count. Patients treated with hydroxyurea should be monitored every 3 months with CBCs. The dose is titrated to achieve an absolute neutrophil count between 1,250 and 4,000, with a maximum dose of 35 mg/kg/day. Recommendations for initiation and monitoring of hydroxyurea therapy are summarized in [Yawn: 2014].
Patients with abnormal cerebral velocities measured by transcutaneous Doppler should be treated with chronic red cell transfusions, which has been shown to decrease stroke risk by 90%. [Adams: 1998] New data suggest that children with abnormal TCDs who have had more than 1 year of chronic transfusions may be safely switched to a maximal tolerated dose of hydroxyurea for primary stroke prophylaxis. [Ware: 2016]
Secondary prevention
Patients with prior stroke should begin a chronic transfusion regimen to prevent stroke recurrence. The goal of chronic transfusions is to maintain sickle hemoglobin percentage <30% and maximum hemoglobin <11-12 g/dL. Chronic transfusions are sometimes prescribed for patients with frequent and severe episodes of vaso-occlusive pain or acute chest syndrome.
Iron chelators are prescribed for patients receiving chronic transfusions who have evidence of iron overload. This therapy should be monitored by a hematologist familiar with this medication. Patients will need annual ophthalmology and audiology screening while taking iron chelators.
L-glutamine was approved by the FDA in July 2017 for patients age 5 years and older. This is the first drug to gain approval for sickle cell disease in more than 2 decades. It is an oral medication taken twice daily and has been shown to decrease rates of acute chest syndrome, as well as frequency of hospitalization and length of stay for vaso-occlusive pain crises in patients who had 2 or more episodes of pain in the preceding year. It is well-tolerated with a minimal side effect profile that may include constipation, nausea, abdominal pain, or headache.
Management of acute complications
Vaso-occlusive pain crisis: Patients presenting with painful crises should receive therapy with NSAIDs and opiates. Moderate to severe episodes may require treatment with parenteral opiates and hospitalization. Intravenous fluid hydration can help decrease red blood cell sickling. The Pain Rating Scale (Wong-Baker FACES Foundation) is a self-assessment that uses expressions on faces to depict pain level. The scale can be used with people ages 3 and older to facilitate communication and improve assessment so pain management can be addressed. Sickle Cell: What to Do When Your Child is Experiencing Pain (Children's Hospital Colorado) (
304 KB) lists steps for comforting a child with sickle cell who is experiencing pain and includes medication dosing charts.Acute chest syndrome: Patients with respiratory symptoms and a new infiltrate on chest radiography should be treated empirically with a third-generation cephalosporin and macrolide antibiotic. Simple or red cell exchange transfusion may be required for worsening respiratory distress.
Splenic sequestration: Patients should be admitted to the hospital for serial examinations and CBCs. Red cell transfusion may be required.
Sickle Cell: When to Call The Doctor (Children's Hospital Colorado) (
287 KB) lists possible symptoms in children with sickle cell disease that may indicate a serious problem and need immediate medical
attention.
Subspecialist Collaborations & Other Resources
Pediatric Hematology/Oncology (see Services below for relevant providers)
Children should be followed by a pediatric hematologist who has expertise in sickle cell disease and hemoglobinopathies and who can provide comprehensive care as well as management of acute complications.
Sickle Cell Disease Centers (see Services below for relevant providers)
The care of all patients with sickle cell disease should be directed/overseen by a clinic that specializes in that care and collaborates with primary care to assure high-quality comprehensive care. Distance from such a center may determine where key care components are delivered.
Audiology (see Services below for relevant providers)
Children and adolescents will need annual screening while taking iron chelators.
Pediatric Ophthalmology (see Services below for relevant providers)
Children and adolescents will need annual screening while taking iron chelators.
Neurology
Subspecialist Collaborations & Other Resources
Pediatric Neurology (see Services below for relevant providers)
Patients with a history of overt stroke or cerebral vasculopathy should be referred for annual follow-up. Neurology will continue to monitor for progression of cerebral vasculopathy, which might warrant intervention with the encephaloduroarteriosynangiosis (EDAS) procedure.
Neuropsychiatry/Neuropsychology (see Services below for relevant providers)
Patients with impaired school performance or history of silent cerebral infarction or overt stroke should be referred for formal neuropsychology assessment. Appropriate learning accommodations should be made within the context of an IEP or 504 plan based on these results.
Renal
Subspecialist Collaborations & Other Resources
Pediatric Nephrology (see Services below for relevant providers)
Refer patients with significant proteinuria or abnormal kidney function for evaluation and collaborative management.
Recreation & Leisure
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Learning/Education/Schools
Transitions
Elements essential for successful transition from pediatric to adult sickle cell care include counseling the patient about the transition prior to transfer; communicating among pediatric and adult providers, ensuring that the first visit to an adult provider is before the final pediatric visit or within 1-3 months of the last pediatric visit. [Sobota: 2017] Potential quality indicators for successful transition are:
- The individual is keeping clinic appointments and remaining adherent to treatment and medications.
- The written transfer summary has been sent to the adult provider.
- The first visit to adult provider is within an appropriate interval after leaving pediatric hematology.
- Overall quality of life is good.
Questions from Clinicians
How do I interpret the newborn screening report and what should I do if the results are consistent with possible sickle cell disease?
The newborn screening report will list the types of hemoglobin present in decreasing order of relative quantity. Because fetal
hemoglobin is most common in the first several weeks of life, it is always listed first in untransfused babies. Normal infants
should have a screen showing “F+A”. Patients with one of the sickling disorders may have newborn screens showing “F+S”, “F+S+A”
or “F+S+C”. Patients with “F+A+S” have sickle cell trait.
If a child’s newborn screen results are consistent with possible sickle cell disease, the state newborn screening lab will
provide instructions for sending a second newborn screen to confirm the abnormal hemoglobin pattern. If sickle cell disease
is confirmed, the patient should be referred to pediatric hematology or a comprehensive sickle cell center. Penicillin prophylaxis
should be prescribed by two months of age for patients with severe phenotypes (homozygous sickle cell anemia or sickle beta0
thalassemia) if there is a delay in subspecialty evaluation.
Sickle Cell Disease has further Information about initial clinical response to a positive newborn screen.
What additional immunizations to patients with sickle cell disease need?
You should consult the latest version of the CDC Immunization Schedule for high-risk patients with functional or anatomic
splenectomy for details as this may change annually.
Patients with sickle cell disease should receive annual influenza immunization. Because of the functional asplenia, they are
at increased risk for infection with encapsulated organisms. Therefore, they should complete the normal pneumococcal series
with PCV13 as well as a dose of PPSV23 after the age of 2 and at least 8 weeks after the last PCV13. A single booster of PPSV23
should be administered 5 years after the last dose of PPSV23. Primary meningococcal vaccination should occur early with two
doses given 8 weeks apart starting at age 2 years. They should also receive meningococcal B vaccination.
What counseling should I perform for a patient with sickle cell trait?
Sickle cell trait is common with a prevalence of up to 1 in 20 in African Americans. It is appropriate for primary care providers
to provide counseling to patients regarding their sickle cell trait status. It is important that patients know they do not
have sickle cell disease. Patients with sickle trait rarely have health problems. In some extreme conditions, such as severe
dehydration or high altitude, there may be complications such as rhabdomyolysis or splenic infarction. Sometimes patients
with sickle trait may have blood in their urine and should notify their doctor immediately if this happens.
Patients should also be made aware of the reproductive implications of their trait status. If their partner also has sickle
trait or beta thalassemia trait, then their offspring have a 25% chance of having sickle cell disease. We encourage patients
to discuss their partner’s trait status prior to conceiving.
Do patients with sickle cell trait experience any symptoms or complications?
In general, individuals with sickle cell trait are asymptomatic and do not experience sickle-related complications like pain. Some data suggest individuals with sickle trait may be at slightly increased risk for renal complications (hematuria), venous thromboembolism (PE) in adulthood, and rarely experience splenic infarction when exposure to altitude. Testing for sickle cell trait is required by the NCAA for college athletes as there have been rare cases of exercise-related complications in individuals who carry sickle cell trait .[Naik: 2015]
Issues Related to Sickle Cell Disease
Funding & Access to Care
Writing Letters of Medical NecessityResources
Information for Clinicians
Information about initial clinical response to a positive newborn screen; Medical Home Portal.
Evidence-Based Management of Sickle Cell Disease (NIH) ( 3.2 MB)
Synthesizes the available scientific evidence on sickle cell disease and offers guidance to busy primary care clinicians;
Expert Panel Report, 2014, National Institutes of Health.
Sickle Cell Disease (GeneReviews)
An expert-authored, peer-reviewed, current disease description that applies genetic testing to diagnosis and management information;
U.S. National Library of Medicine.
Helpful Articles
PubMed search for articles published in the last year about sickle cell disease in children
Ataga KI, Kutlar A, Kanter J, Liles D, Cancado R, Friedrisch J, Guthrie TH, Knight-Madden J, Alvarez OA, Gordeuk VR, Gualandro
S, Colella MP, Smith WR, Rollins SA, Stocker JW, Rother RP.
Crizanlizumab for the Prevention of Pain Crises in Sickle Cell Disease.
N Engl J Med.
2017;376(5):429-439.
PubMed abstract / Full Text
Piel FB, Steinberg MH, Rees DC.
Sickle Cell Disease.
N Engl J Med.
2017;376(16):1561-1573.
PubMed abstract
Ribeil JA, Hacein-Bey-Abina S, Payen E, Magnani A, Semeraro M, Magrin E, Caccavelli L, Neven B, Bourget P, El Nemer W, Bartolucci
P, Weber L, Puy H, Meritet JF, Grevent D, Beuzard Y, Chrétien S, Lefebvre T, Ross RW, Negre O, Veres G, Sandler L, Soni S,
de Montalembert M, Blanche S, Leboulch P, Cavazzana M.
Gene Therapy in a Patient with Sickle Cell Disease.
N Engl J Med.
2017;376(9):848-855.
PubMed abstract
Wang CJ, Kavanagh PL, Little AA, Holliman JB, Sprinz PG.
Quality-of-care indicators for children with sickle cell disease.
Pediatrics.
2011;128(3):484-93.
PubMed abstract
Clinical Tools
Assessment Tools/Scales
Pain Rating Scale (Wong-Baker FACES Foundation)
Self-assessment that uses expressions on faces to depict pain level.
Patient Education & Instructions
Sickle Cell: What to Do When Your Child is Experiencing Pain (Children's Hospital Colorado) ( 304 KB)
Steps for comforting a child with sickle cell who is experiencing pain; includes medication dosing charts and suggestions
for when to call your doctor.
Sickle Cell: When to Call The Doctor (Children's Hospital Colorado) ( 287 KB)
Symptoms in children with sickle cell disease that may indicate a serious problem and need immediate medical attention.
Hydroxyurea for Sickle Cell (Hospital for Sick Children) ( 395 KB)
Information sheet for parents with children prescribed hydroxyurea (Hydrea). The handout has information about side effects
and instructions for how to administer hydroxyurea, what to do if a dose is missed, and safety measures to prevent infections.
Information & Support for Families
Platt AF, Eckman J, Hsu L.
Hope & Destiny: The Patient and Parent's Guide to Sickle Cell Disease and Sickle Cell Trait.
4th ed. Hilton Publishing;
2016.
098475668X https://www.amazon.com/Hope-Destiny-Patient-Parents-Disease/dp/0984756...
A 260-page book that offers in-depth information about research, treatment, pain management, and preventing complications.
Family Diagnosis Page
Information on the Web
Information for parents to help them better care for their child with Rett syndrome (and other complex conditions) from diagnosis through their child's transition to adult care.
Sickle Cell Disease (Genetics Home Reference)
Excellent, detailed review of condition for patients and families; sponsored by the U.S. National Library of Medicine.
Sickle Cell Disease Fact Sheets and Guides (CDC)
Fact sheets, toolkits, and guides about the many aspects of living with sickle cell disease; Centers for Disease Control and
Prevention.
National & Local Support
Sickle Cell Disease Association of America
The mission of this nonprofit is to improve the quality of health, life, and services for individuals, families, and communities
affected by sickle cell disease and related conditions while promoting the search for a cure.
Services for Patients & Families in Montana
Neuropsychiatry/Neuropsychology
See all Neuropsychiatry/Neuropsychology services providers (3) in our database.
Pediatric Genetic Counseling
See all Pediatric Genetic Counseling services providers (5) in our database.
Pediatric Hematology/Oncology
See all Pediatric Hematology/Oncology services providers (10) in our database.
Sickle Cell Disease Centers
We currently have no Sickle Cell Disease Centers service providers listed; search our Services database for related services.
For other services related to this condition, browse our Services categories or search our database.
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