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Skin in Hematological Diseases

Following are the cutaneous manifestations of haematological disease
Hyperpigmentation in megaloblastic anemia
Urticaria after hot water bath and palmarerythema is seen in polycythenria vera
Painful ecchymosis at the site of minor trauma is called autoerythrocyte sensitization syndrome sensitization to extravasated RBCs 
Cutaneous bleeds are classified as given below
  • Petechiae < 2 mm size
  • Purpura   2-5 mm size
  • Ecchymosis > 5 mm size