Ossification common hamstring tendon

Case contributed by Chris O'Donnell
Diagnosis certain


Incidental finding on pelvic radiograph for hip pain.

Patient Data

Age: 70 years
Gender: Male

Unusual ossification parallel to the proximal femur (arrowed)

Clarification of XR findings


Well-defined ossification in the common hamstring tendon (biceps and semitendinosus) on the left.  Minimal change in a similar location on the right.

Case Discussion

Dystrophic ossification in tendons is well recognized (e.g. Achilles), however, the location and extent in this case is very unusual.  Note how the calcification is well ossified (ie looks like bone).  It is presumed to have occurred due to previous injury some time ago.

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