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What is Petechiae in scurvy is due to and explain in detail?
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