Introduction:Snapping at the lateral knee can be caused by a variety of pathologies involving surrounding soft tissue structures such as the popliteus, semitendinosus and/or gracilis tendons, IT Band syndrome, lateral meniscus tears, or rheumatoid nodules.1-4snapping In rare instances, lateral knee pain may also be caused by the distal tendon of the biceps femoris long head shifting over the fibular head.5-6 Regardless, the various differential diagnoses should be properly ruled out by a careful history, a detailed physical exam, and advanced imaging.Few cases of snapping biceps femoris tendons have been recorded in the literature across various case reports. Causes of the snapping biceps femoris tendon have been attributed to anomalous insertions (most prevalent), 7-16 tendon subluxation,17-18 abnormalities of the fibular head,19-23 or secondary to trauma. 6, 24 Conservative treatment is usually attempted first and consists of physical therapy and anti-inflammatory medications as needed. Surgery, which is usually the last resort and the most effective, consists of resecting the anomalous tendon insertion or correcting any fibular deformities.In this report, we present a patient with lateral knee pain from an accessory insertion of the snapping biceps femoris tendon and discuss surgical exploration and repair. The patient was informed that his case would be submitted for publication and he provided consent.
