Sickle cell disease: a clinical and histopathologic study of the liver in living children.
OBJECTIVE
To study hepatic lesions in living children with sickle cell disease. Although such lesions are well known, the possibility of chronic persistent damage to the parenchyma resulting from the disease itself or iron overload is controversial.


METHODS
Sixteen children with sickle cell disease aged 15 months to 18 years were prospectively investigated out of 741 patients younger than 20 years registered at Hemominas Foundation, Brazil. Inclusion criteria for biopsy were as follows: five had positive anti-hepatitis C virus (HCV) antibody, two had positive hepatitis B virus (HBV) surface antigen and persistently increased levels of aminotransferases, and nine underwent biopsy during abdominal surgery.


RESULTS
Children with B or C hepatitis were significantly older than the others and also had increased levels of both alanine and aspartate aminotransferases. Lobular architecture was preserved in all nonviral cases; mild to moderate sinusoidal dilatation was present in eight, hepatocellular regenerative activity in six, and focal necrosis and corresponding mild inflammatory infiltrate in three. No fibrosis or bile duct damage was observed. Mild to severe hemosiderosis was present in all children except one. The degree of iron overload was clearly associated with the number of previous blood transfusions. All five children with HCV had chronic hepatitis. One of the children with HBV had incomplete and the other had definite cirrhosis.


CONCLUSIONS
These data indicate that chronic hepatic lesions in children with sickle cell disease may be caused by viral damage. Patients without evidence for viral etiology had reversible vascular lesions. Follow-up studies would be necessary to confirm this hypothesis but are precluded for ethical reasons. Hemosiderosis was not associated with fibrosis in any nonviral cases, but a larger number of patients would be necessary to establish valid conclusions.
Teixeira
Ana Lúcia
AL
Department of Pediatrics, Federal University of Minas Gerais, Brazil.
Viana
Marcos Borato
MB
Roquete
Mariza Leitão Valadares
ML
Toppa
Nivaldo Hartung
NH
D000293:Adolescent; D000410:Alanine Transaminase / Q000097:blood; D000755:Anemia, Sickle Cell / Q000150:complications / Q000473:pathology*; D001219:Aspartate Aminotransferases / Q000097:blood; D001652:Bile Ducts / Q000473:pathology; D001706:Biopsy; D001803:Blood Transfusion / Q000706:statistics & numerical data; D002648:Child; D002675:Child, Preschool; D002769:Cholelithiasis / Q000150:complications / Q000473:pathology; D004920:Erythropoiesis; D005260:Female; D005293:Ferritins / Q000097:blood; D006486:Hemosiderosis / Q000209:etiology / Q000473:pathology; D019694:Hepatitis B, Chronic / Q000150:complications / Q000473:pathology; D019698:Hepatitis C, Chronic / Q000150:complications / Q000473:pathology; D006801:Humans; D008099:Liver / Q000473:pathology*; D008297:Male; D010587:Phagocytosis; D011446:Prospective Studies; D065227:Transfusion Reaction
D005293:Ferritins; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase