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Hereditary Spherocytosis in a 22 Month Old Child

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Hereditary Spherocytosis in a 22 Month Old Child TAJ December 2017; Volume 30 Number-2 ISSN 1019-8555 The Journal of Teachers Association RMC, Rajshahi Case Report Hereditary Spherocytosis in a 22 Month Old Child Mst. Musarrat Sultana1, Md. Shafiqul Islam2, Md. Sanaul Haque Mia3 Abstract Hereditary spherocytosis (HS) is a familial hemolytic disorder with marked heterogeneity of clinical features, ranging from asymptomatic condition to a fulminant hemolytic anemia. Although a positive family history of spherocytosis increases the risk for this disorder, it may be sporadic in some case. A 22-month old girl was admitted in Rajshahi Medical College Hospital with pallor and jaundice. Her parents gave history of repeated episodes of pallor and jaundice since 8 month of age with negative family history. Blood film showed plenty of spherocytes, reticulocytosis of 15.0%, negative direct antiglobulin test& positive osmotic fragility test. She was managed conservatively on nutritional supplements& one unit of blood transfusion. To the best of our knowledge, this is the first reported case of hereditary spherocytosis from Rajshahi Medical College Hospital. Key words: Anaemia, Jaundice, Spherocytosis, Hereditary TAJ 2017; 30: No-2: 79-82 Introduction: much difficulty, and additional investigations are Hereditary spherocytosis (HS) is a familial not required. Atypical cases may require hemolytic disorder with marked heterogeneity of measurement of erythrocyte membrane proteins to clinical features range from asymptomatic to clarify the nature of the membrane disorder, and fulminant hemolytic anemia. The condition was occasionally, molecular genetic tests are required first described in 1871.1 HS is the commonest to determine the mode of inheritance. In autosomal cause of inherited chronic hemolysis in Northern dominant form, the deficiency is mild, and hence, Europe and North America, with a reported the anemia is mild while in the recessive form, the incidence of 1 in 5,000 births.2 In 80% of the deficiency is greater and the anemia is profound. instances, the inheritance of HS is autosomal 3 Case summary dominant and in others autosomal recessive. In In April 2017, a 22-month old girl was brought to North India, both autosomal dominant and the Rajshahi Medical College Hospital and was recessive patterns have been reported with admitted with a severe pallor, mild jaundice and presentation similar to that in other populations weakness. The girl’s family lives in Nachol, but the underlying protein defect has not been Chapainawabgonj, and her parents are non- characterized.4 To our knowledge, no case has consanguineous. Before attending the hospital, the been reported from Rajshahi, Bangladesh. A child was treated with some unspecified family history and typical clinical and laboratory medicines. Systemic enquiry revealed that she had findings make the diagnosis possible without been suffering from repeated attacks of jaundice 1 Junior Consultant (Paediatrics), Upazila Health Complex, Gurudaspur, Natore. 2 Registrar, Department of Gastroenterology, Rajshahi Medical College Hospital, Rajshahi. 3 Professor & Head, Department of Paediatrics, Rajshahi Medical College, Rajshahi. 00 TAJ December 2017; Volume 30 Number-2 and pallor since she was 7 months old. This long- Discussion standing illness was usually managed locally but In the presence of a large number of spherocytes she was occasionally given folic acid and 1 unit of in the peripheral blood film, a major alternative blood transfusion when she was 12 months old. differential diagnosis was autoimmune haemolysis Her birth history was uneventful, and she did not (which can mimic HS). A positive direct Coomb’s have neonatal jaundice. The girl was immunized test (detection of antibody on RBCs using direct as per the Expanded Programmed on antiglobulin) indicates autoimmune Immunization schedule. She has one elder brother hemolyticanemia. Other rare causes of and there was no same type of illness in her other spherocytosis include thermal injury, Clostridial family member. At admission, the girl looked sick, septicaemia with exotoxaemia, and Wilson’s pale and icteric. She was afebrile. Her pulse rate disease, which may present with transient was 110 per minute, blood pressure 90/60 mmHg, hemolytic anemia. Hemolytic anemia is also a and respiration rate 22 per minute. On abdominal feature of haemoglobinopathies, which are examination, liver was palpable 2 cm from the diagnosed by hemoglobin electrophoresis. In HS, right subcostal margin in the right mid-clavicular the haemoglobin electrophoresis is normal, and line which was soft and non-tender. Her spleen presence of microspherocytes on the blood smear was also palpable 2 cm below from the left costal confirms the diagnosis. The differentials focus on margin in anterior axillary line along its long axis the causes of a fall in the RBC surface towards the right iliac fossa was which soft in area/volume that occur in autoimmune hemolytic consistency, non-tender, moves with respiration. anemia, HS, and microangiopathic anemia. Other system examinations revealed no However, in our presented case, there were no abnormality. So our provisional diagnosis was suggestive features, such as fragmented RBC, congenital hemolytic anaemia. On investigation which in favor of microangiopathy. Therefore, a during admission hemoglobin was 5.3 g/L, white negative direct Combs test, positive osmotic blood cell count of 16,000/mm3 with unremarkable fragility test, a blood smear showing spherocytes, differential counts. Red cell indices reveled that and a raised reticulocyte count all suggest that mean corpuscular volume (MCV)100.5 fl, mean hereditary spherocytosis was the likely diagnosis. corpuscular hemoglobin (MCH)24.8 pg & mean Microspherocytosis is the morphological hallmark corpuscular hemoglobin concentration of HS, which is caused by loss of membrane (MCHC)was 28.62 g/dL that were within normal surface area, with abnormal osmotic fragility in limit and raised reticulocyte count (15.0%) and vitro. The pathophysiology of HS involves 5 serum bilirubin (3.4 mg/dl). Peripheral blood film proteins, which are key components of the showed moderate rouleaux formation with cytoskeleton responsible for RBC shape. anisopoikilocytosis, spherocytosis, poly chromatic Abnormalities of spectrin or ankyrin are the most cells and few nucleated red cells. Hemoglobin common molecular defects. The decreased electrophoresis was normal. Coombs test—both deformability of the spherocytic RBCs impairs cell direct and indirect—was also negative. In passage from the splenic cords to the splenic anosmotic fragility test of red blood cell (RBC) sinuses, and the spherocytic RBCs are destroyed showed that lysis started at 0.6% NaCl solution prematurely in the spleen. Hereditary and 50% lysis was completed at 0.4% NaCl spherocytosis usually is transmitted as an solution; osmotic fragility test was positive. autosomal dominant or, less commonly, as an Ultrasonographic examination of her abdomen autosomal recessive disorder. In about 25% of revealed hepatosplenomegaly butno gallstones cases, there is no previous family history. In the were found. During her hospital stay, the patient neonatal period, HS is a significant cause of received folic acid and multivitamins and got 1 hemolytic disease and can be manifest as anemia unit of blood transfusion. TAJ December 2017; Volume 30 Number-2 00 and hyperbilirubinemia sufficiently severe to destroyed almost exclusively in the spleen; require phototherapy or exchange transfusions. splenectomy eliminates most of the hemolysis. After splenectomy, the anemia, Although some children are asymptomatic in hyperbilirubinemia, and incidence of gallstones childhood, others may have pallor (anemia), are significantly lessened, but not completely fatigue, and exercise intolerance. In severe cases, eradicated. Splenectomy is associated with marked expansion of the diploic spaces skull immediate surgical morbidities in addition to a bones and medullary region of other bones is lifelong increased risk for sepsis, particularly by observed but to a much lesser extent than observed pneumococcal species. This risk is not completely in patients with thalassemia. After infancy, eliminated with the requisite preoperative and splenomegaly is common; there is no correlation postoperative vaccination against Pneumococcus, between spleen size and disease severity. Bilirubin Meningococcus, and Haemophilus influenzae type gallstone formation is a function of age; they can b. Splenectomy is recommended for patients with form as early as age 4-5 yrs. and are present in the severe HS. It should be considered for patients majority of adult patients. The diagnosis of HS can with moderate HS and frequent hypoplastic or be established from a positive family history and aplastic crises, poor growth, or cardiomegaly. It is the presence of typical clinical and laboratory generally not recommended for patients with mild features of the disease: splenomegaly, spherocytes HS. When splenectomy is indicated, it should be on the blood smear, reticulocytosis, and an performed after the age of 6 years, if possible, to elevated mean corpuscular hemoglobin avoid the heightened risk of post-splenectomy concentration. If these are present, no additional sepsis in younger children. Patients should be testing is necessary to confirm the diagnosis. given 1 mg of folic acid daily for preventing Although no test for HS is 100% reliable, the secondary folic acid deficiency, and oral penicillin EMA binding test had a diagnostic sensitivity and (penicillin
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