FOOT & ANKLEOsteochondrosis of the accessory ossification centre of the medial malleolusFarsetti, Pasqualea; Dragoni, Massimilianoa,b; Potenza, Vitoa; Caterini, RobertoaAuthor Information aDepartment of Orthopaedic Surgery, University of Tor Vergata bDepartment of Orthopaedic Surgery, Casa di Cura Karol Wojtyla Hospital, Rome, Italy Correspondence to Pasquale Farsetti, MD, Department of Orthopaedics Surgery, University of Rome ‘Tor Vergata’, Viale Oxford 81, Rome 00133, Italy Tel: +39 062 090 3466; fax: +39 062 090 3465; e-mail: [email protected] Journal of Pediatric Orthopaedics B: January 2015 - Volume 24 - Issue 1 - p 28-30 doi: 10.1097/BPB.0000000000000122 Buy Metrics Abstract We report a case of a painful accessory ossification centre of the medial malleolus in an 11-year-old girl who was not involved in sports activities. The patient was treated conservatively, with complete clinical and radiographic healing of the medial malleolus 6 months after the first presentation. We ruled out the uncommon pathological conditions causing chronic pain in the medial malleolus during skeletal growth, such as traction apophysitis of the medial malleolus, osteochondrosis, osteochondritis or avascular necrosis of the distal tibial epiphysis. We speculate that this painful condition may be classified as an osteochondrosis of the accessory ossification centre of the medial malleolus. Copyright © 2015 Wolters Kluwer Health, Inc. All rights reserved.