Stenosing tenosynovitis and impingement of the peroneal tendons associatedwith hypertrophy of the peroneal tubercle

We report three patients with lateral ankle and foot pain, with the diagnos is of stenosing tenosynovitis of the peroneus longus tendon associated with a markedly enlarged peroneal tubercle. Stenosing tenosynovitis of the pero neus longus tendon associated with an atraumatically enlarged peroneal tube rcle has rarely been reported, and these reported cases were associated wit h an os peroneum.(4,6) One of our patients had no demonstrable associated o s peroneum but did have a bony tunnel enveloping the peroneus longus tendon . Our other two patients had an os peroneum, but were asymptomatic at the l ateral outer border of the cuboid tunnel; one patient had involvement of th e peroneus longus and brevis tendons.