1Seymour J, 2Andrisevic E
1MountainView Regional Medical Center, Las Cruces, NM, USA; 2Phoenix Children’s Hospital, Phoenix , AZ, USA
We present the rare case of a 9-year-old active female who was referred to our hospital with a two-year history of right focal posterolateral ankle pain despite aggressive nonoperative treatment. Her retromalleolar pain was consistent with the magnetic resonance imaging (MRI), which showed an accessory peroneal muscle/tendon. This complex was identified as an accessory peroneus quartus. MRI also revealed low-lying attenuation of the peroneus brevis muscle just distal to the lateral malleolus as well as slight convex anatomy of the distal posterior fibular epiphyses. We performed resection of the accessory peroneus quartus, resection of the low-lying peroneus brevis muscle, and performed a retromalleolar groove deepening distal to the physes all to decrease overstuffing pain. This resolved the patient’s symptoms completely and allowed her to return to sports after rehabilitation.
