Abstract
There are numerous causes of cavovarus feet, the most common of which are the hereditary motor and sensory peripheral neuropathies. Regardless of the underlying aetiology, cavovarus feet are caused by muscle imbalance. Often the imbalance is between a relatively strong tibialis posterior acting against a weaker peroneus brevis, and a relatively weak tibialis anterior being over powered by peroneus longus. Intrinsic muscle weakness and gastro-soleal tightness is common.
After the failure of non-operative management, flexible deformity can be corrected with a combination of tendon transfers and osteotomies. Frequently surgical management of cavovarus feet involves a combination of calcaneal and first metatarsal osteotomies, peroneus longus to brevis transfer, transfer of tibialis posterior through the interosseous membrane to the dorsum of the foot, tendo-Achilles and plantar fascia lengthening and correction of toe deformities.
The post-operative recovery is slow, but most patients achieve good functional results and report improvements in their activities of daily living.
The abstracts were prepared by David AF Morgan. Correspondence should be addressed to him at davidafmorgan@aoa.org.au
Declaration of interest: a
