Petechiae in scurvy is due to: (A) Platelet dysfunction, (B) Thrombocytopenia, (C) Clotting factor deficiency, (D) Endothelial disintegration
Answer is D. Vitamin C deficiency causes defective formation of collagen with impaired healing of wounds, capillary haemorrhage and reduced platelet adhesiveness (normal platelets are rich in ascorbate) . Petechiae are formed due to minor bleeds from capillary vessels due to endothelial disintegration . Ref - Davidson 23e p716