Digital pseudotumor associated with Von Willebrand disease

Hemophilic pseudotumor is a term used to describe a progressive, encapsulated, slowly expanding, cystic mass occurring as a result of recurrent hemorrhage, usually in soft tissues but occasionally in bone or subperiosteal location. It is an uncommon but serious complication of bleeding diathesis occurring in only 1-2% cases and has mostly been reported in severe factor VIII and IX deficiency. We describe a rare case of hemophilic pseudotumour of the left 5th metacarpal bone in a 13 year old male child diagnosed with von Willebrand disease.