Previously undiagnosed hereditary spherocytosis in a patient with jaundice and pyelonephritis: a case report

Background Hereditary spherocytosis is autosomal dominant inherited extravascular hemolytic disorder and is the commonest cause of inherited hemolysis in northern Europe and the United States. The classical clinical features of hereditary spherocytosis are anemia, jaundice, and splenomegaly. However, all of these classical features are not always revealed in the case of mild hemolysis or when hemolysis is well compensated. Patients with hereditary spherocytosis may remain undiagnosed for years if their hemolysis is mild.