tendinous sheath of extensor digitorum longus muscle of foot

tendinous sheath of ex·ten·sor di·gi·to·rum lon·gus mus·cle of foot

[TA] the anterior tarsal synovial tendon sheath that surrounds the tendons of the extensor digitorum longus muscle and the peroneus tertius in their passage across the ankle. Synonym(s): vagina tendinum musculi extensoris digitorum (pedis) longi [TA]