Post-traumatic ossification of the Achilles tendon: description of a case.

The presence of small areas of ossification in the Achilles tendon is a relatively frequent finding. It is instead rare to find large, extensive ossifications for more than half of the tendon. The authors describe a case of a man aged 45 years who, in the wake of an unknown lesion of the Achilles tendon, developed clinically symptomatic ossification 9.5 cm in length and 2.3 cm in width. The patient was treated surgically by removal of the ossified portion and repair of the diastasis with a proximal Achilles flap. After 17 months, the patient is asymptomatic, there are no disorders in walking, and he exclusively shows moderate limitation in range of movement of the ankle joint associated with tricipital hyposthenia. Bone metaplasia of the Achilles tendon is a rare event, that can follow trauma or surgery. The size of the area to be removed implies considerable difficulty in repair of the continuity and in recovery of the length of the tendon.