Isolated rupture of distal semitendinosus is reported rarely. Here, we report a case of 51-year-old previous healthy working man diagnosed with isolated semitendinosus tendon rupture treated successfully by conservative management. Although rare, distal ruptures of isolated semitendinosus tendon have been reported previously [3][4][5][6] . However, all of these previous reports were based on professional young athletes whom mostly resulted from competitive sports activity. Here, we report a case of 51-year-old previous healthy working man diagnosed with isolated semitendinosus tendon rupture treated successfully by conservative management. The patient was informed that data concerning the case would be submitted for publication, and he consented.
Key W ords: Semitendinosus tendon, Isolated injuryA 51-year-old previous healthy working man presented with popliteal area pain. Although he was active, he was not a professional sports player. The pain presented for 1 week. He claimed that the shooting-nature pain developed in medial aspect of popliteal area during stair climbing in knee extension position.On physical examination, there was a palpable gap along the distal medial hamstring tendons that was accentuated on knee flexion. There was tenderness on palpation along the medial side of the popliteal fossa, which was exacerbated by resisted knee flexion. A full range of knee movement was maintained, and there was no medial joint laxity on valgus straining at 0 and 30 degrees of flexion.Magnetic resonance imaging (MRI) of the knee was performed.MRI examinations were performed on a 1.5 Tesla MR scanners (GE Medical Systems, Milwaukee, WI, USA) using a phased array knee coil. The MR protocol included coronal, sagittal and