Abstract
Clinical and hematological parameters in six cases of paroxysmal nocturnal hemoglobinuria (PNH) are presented. The mean delay in diagnosis after onset of symptoms was 3.7 years. Initial diagnoses considered were: (a) hematuria; (b) iron-deficiency; hemolytic; megaloblastic or refractory anemia and (c) myelodysplastic syndrome. Clinical features included; reddish urine (5/6), unexplained abdominal pain (4/6) and pallor (6/6). Laboratory investigations showed anemia (6/6), leucopenia (3/6), thrombocytopenia (3/6), unconjugated hyperbilirubinemia at some stage (6/6), and bone marrow erythroid hyperplasia (6/6). Complications encountered were (a) gall stones needing cholecystectomy, hemosiderosis and proximal tubular acidosis in 1 case, (b) disseminated tuberculosis in 1 case and (c) abortion with congestive cardiac failure in one. PNH may present with atypical features and tests for hemosiderinuria, sucrose lysis test and HAM's test are required to establish the diagnosis.
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