Arthroscopic treatment of an avulsion fracture of the ligamentum teres of the hip in an 18-year-old horse rider.

We present the case of an 18-year-old horse rider with an avulsion fracture of the ligamentum teres causing persistent hip pain and locking for 2 years. The patient had no history of major trauma; however, repeated minor hyperabduction injuries occurred. We were able to successfully treat this patient by arthroscopic removal of the bony fragments and two loose bodies and partial resection of the ligamentum teres.