Bilateral ossification in the Achilles tendon: a case report.

Bilateral symmetrical Achilles tendon ossification is presented, with a fracture on one side. A 57 year old male patient was conservatively treated for bilateral clubfeet in his childhood. Part of his Achilles tendons were replaced by ectopic bony mass and on the left it fractured without any trauma. The fracture was treated surgically by vertical thinning, intraosseal suture "osteosynthesis", and tendon flap plasty. This pathological condition healed in three months. Seven years after the operation the X-ray revealed total bony rebuilding. The ectopic bone mass has the same biological behaviour as the anatomic bones.