Retroperitoneal Hemorrhage in a Neonate: A Rare Presentation of Hemophilia B

Hemophilia is one of the most common inherited coagulation disorder; with almost half of the cases presents in the neonatal period with bleeding episodes specially post circumcision, although family history is present in about two third cases. retroperitoneal hemorrhage is a very rare presentation of hemophilia and to the best of our knowledge has not described yet, as initial presentation of hemophilia b in the neonatal period. we are presenting retroperitoneal hemorrhage as initial presentation of hemophilia b, in the presence of family history which has not been disclosed till the baby become symptomatic.