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Case Reports in Radiology
Volume 2016, Article ID 8739362, 4 pages
Case Report

Painful Os Peroneum Syndrome: Underdiagnosed Condition in the Lateral Midfoot Pain

1Division of Radiology, Antonio Prudente Hospital, Fortaleza, CE, Brazil
2School of Medicine, Division of Radiology, University of Fortaleza, Fortaleza, CE, Brazil
3School of Medicine, Division of Radiology, Christus University Center, Fortaleza, CE, Brazil
4Division of Radiology, Internal Medicine Department, Ribeirao Preto Medical School, Sao Paulo University, Ribeirão Preto, SP, Brazil

Received 9 May 2016; Accepted 23 June 2016

Academic Editor: Atsushi Komemushi

Copyright © 2016 Francisco Abaete Chagas-Neto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Os peroneum is an accessory ossicle located within the peroneus longus tendon. The painful os peroneum syndrome (POPS) results from a wide spectrum of conditions, including fractures, diastases, and other causes. POPS can result in tenosynovitis or discontinuity of the peroneus longus tendon with a clinical presentation of pain in the lateral aspect of the midfoot. Authors report a typical case of POPS, illustrating this entity through different imaging methods (radiographs, ultrasound, and magnetic resonance imaging). We emphasize the prevalence of this ossicle and discuss painful complications.