title: Painful Os Peroneum Syndrome: Underdiagnosed Condition in the Lateral Midfoot Pain.
abstract: 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.
authors.affiliation: Division of Radiology, Antonio Prudente Hospital, Fortaleza, CE, Brazil; School of Medicine, Division of Radiology, University of Fortaleza, Fortaleza, CE, Brazil; School of Medicine, Division of Radiology, Christus University Center, Fortaleza, CE, Brazil.
authors.forename: Francisco Abaete
authors.identifier: 0000-0002-6987-2072
authors.initials: FA
authors.lastname: Chagas-Neto
authors.affiliation: Division of Radiology, Antonio Prudente Hospital, Fortaleza, CE, Brazil.
authors.forename: Barbara Nogueira Caracas
authors.initials: BN
authors.lastname: de Souza
authors.affiliation: Division of Radiology, Internal Medicine Department, Ribeirao Preto Medical School, Sao Paulo University, Ribeirão Preto, SP, Brazil.
authors.forename: Marcello Henrique
authors.identifier: 0000-0002-7436-5315
authors.initials: MH
authors.lastname: Nogueira-Barbosa