ABSTRACT
Thrombotic thrombocytopenic purpura is a syndrome, characterized by microangiopathic hae-molytic anaemia, thrombocytopaenia, neurological symptoms, renal disease and fever. Commonly considered rare, but actually it is one of the most under diagnosed disorders. This study was aimed at evaluating the clinical features, course, prognostic factors and treatment outcome in 17 patients diagnosed as having thrombotic thrombocytopaenic purpura [TTP]. It was a cross-sectional descriptive study at Shaikh Zayed Hospital Lahore. This study includes patients diagnosed as having TTP by the department of haematology from January 2005 to December 2007. Eight of 17 patients were treated with plasma exchange. Six of these 8 patients survived. Plasma infusions were performed in 9 patiejits, 5 of them recovered. Overall 65% patients recovered and mortality was 35%