spastic flat foot

spas·tic flat foot

eversion of the foot with spasm of the muscles (peroneal) on the outer side; often associated with abnormal bars of bone cartilage or fibrous tissue between the calcaneum and the navicular (scaphoid) or between the navicular and the talus, resulting in a tarsal coalition.
References in periodicals archive ?
Retrospect--peroneal spastic flat foot (rigid valgus foot).
The inheritance of tarsal coalition and its relationship to spastic flat foot.
Bone anomalies of the tarsus in relation to "peroneal spastic flat foot.