Abstract
7 cases of avulsion fracture of calcaneum at the insertion of achilles tendon in the leprosy for last 6 years are reported, but there is no subcutaneous rupture of achilles tendon. These fractures were occured on walking without any appreciable trauma. The mechanism of development of the fracture is supposed to be pathologic fracture: it is logical to believe that the avulsion fracture demonstrated in the leprosy is related to the fact that powerful force of gastrocunemius muscle always acts on the calcaneum, which has had a slight atrophy because of disturbance of both sensory and motor nerve.
