title: Osteoid osteoma of the acromion simulating acromioclavicular pain.
abstract: The osteoid osteoma is a benign bone tumour that usually presents with nocturnal pain in young adults, relieved by rest and anti-inflammatories. It can affect any bone; however, their occurrence is rare in the acromion. The authors describe a case of osteoid osteoma located in the acromion, with symptoms that simulated acromion claviculararthrosis. The diagnosis was made by CT scan and treatment was excision of the nidus through arthroscopy. The diagnosis was confirmed by histopathology. In the outpatient segment, the patient remained asymptomatic, with complete recovery of function of the affected limb.
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Alberto Naoki
authors.initials: AN
authors.lastname: Miyazaki
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Fregoneze
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Pedro Doneux
authors.initials: PD
authors.lastname: Santos
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Luciana Andrade
authors.initials: LA
authors.lastname: da Silva
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Guilherme
authors.initials: G
authors.lastname: do Val Sella
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Douglas Lobato Lopes
authors.initials: DL
authors.lastname: Neto
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Melvis
authors.initials: M
authors.lastname: Muchiuti Junior
authors.affiliation: Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Sergio Luiz
authors.initials: SL
authors.lastname: Checchia
keywords: Acromion; Bone neoplasms; Osteoid osteoma