In these individuals the foot is so deformed and under so much stress, severe ankle arthritis develops. [mdmercy.com]

This is most commontly associated with systemic diseases such as rheumatoid arthritis. The injury mechanism is most likely related to pronation and external rotation. [elsevier.es]

RUPTURED TIBIALIS POSTERIOR TENDON ASSOCIATED WITH A CLOSED MEDIAL MALLEOLAR FRACTURE First published: February 1980 Cited by: 29 Abstract Interposition of a ruptured tibialis posterior tendon in a closed fracture of the medial malleolus leading to a [onlinelibrary.wiley.com]

Ruptured tibialis psoterior tendon associated with a closed medial malleolar fracture. Austr N Z J Surg, 50 (1980), pp. 59-60 [6.] R.E. Stein. Rupture of the posterior tibial tendon in closed ankle fractures. [elsevier.es]

In these individuals the foot is so deformed and under so much stress, severe ankle arthritis develops. [mdmercy.com]

For the severe flat foot deformity, the foot becomes quite stiff and a tendon transfer and bone cut is no longer enough to correct the deformity. [mdmercy.com]