Peritesticular scarring: An unusual presentation of hemophilia B.

Hemophilia is an inherited clotting disorder that typically presents as spontaneous hemorrhage or prolonged, excessive bleeding following minor trauma. Abnormalities of the genitourinary tract are a rare manifestation of the disease. Here, we report a case of undiagnosed hemophilia B in a teenage boy presenting with worsening testicular pain and a dumbbell-shaped testis. Scrotal ultrasound identified the presence of a hypoechogenic band constricting the left testicle. Surgical exploration of the left testis was performed with release and sampling of the fibrous tunica vaginalis tissue responsible for the testicular deformity. Histopathological analysis revealed evidence of chronic interstitial inflammation with hypocellular keloid-like fiber formation suggestive of old hemorrhage. The procedure was complicated by a delayed scrotal hematoma. Coagulation studies confirmed a prolonged activated partial thromboplastin time and factor IX assay of 5%. Scrotal evacuation with the administration of intraoperative tranexamic acid achieved effective hemostasis. The patient is doing well with ongoing hematology review and prophylactic recombinant factor IX administration.