Traumatic false aneurysm of the ankle. A case report.

A 27-year-old man incurred a false aneurysm of the peroneal artery secondary to an inversion injury to the ankle. A search of the literature disclosed no other cases of false aneurysms with ankle sprains. The false aneurysm of the peroneal artery appeared as a mass with a compressive neuropathy of the sural nerve. The diagnosis of false aneurysm of the peroneal artery following an inversion injury to the ankle should be suspected in cases of persistent localized swelling with inordinate pain that does not subside with elevation and immobilization and is associated with peroneal neuropathy.