Which one does not cause deep vein Thrombosis -: (A) Oestrogen, (B) Thrombocytosis, (C) Paroxysmal nocturnal haemoglobinuria, (D) Sickle cell anemia
Answer is D. Sickle cell anemia does not cause DVT. They cause vaso-occlusive crisis by plugging the microcirculation (aggregate of Sickle cell are formed in the capillaries because of hypoxia).