Doxycycline sclerotherapy of an intraosseous femoral lymphatic malformation: case report and literature review.

Lymphatic malformations of the femur are rare benign conditions, with few published reports in the literature. Herein is presented an ambulatory 19-year-old male subject with a painful lymphatic malformation of the distal femur characterized by a serpiginous intraosseous and extraosseous extent. Laboratory and physical examination were unremarkable except for a right knee joint effusion and patellar grind. The malformation was sclerosed twice with doxycycline, resulting in patient-reported decreased associated pain from an intensity of 9 of 10 at presentation to 2 of 10 at 9-month follow-up.