title: Osteoid osteoma of the patella: a case report.
abstract: Though osteoid osteoma is a common primary benign lesion of the bones, intra-articular involvement is rare and poses diagnostic difficulties when it affects middle-aged patients. We present the case of a 51-year-old woman with a 2.5 year history of anterior knee pain that was misdiagnosed as osteochondritis dissecans. Radiological findings were absent, whereas MRI showed a well-circumscribed lesion. A local excisional biopsy was performed and microscopic appearance confirmed diagnosis.
authors: Sports Injuries Department, KAT Hospital, Athens, Greece.
authors: Panagiotis G
authors: PG
authors: Vallianatos
authors: Anastasia C
authors: AC
authors: Tilentzoglou
authors: Savvas V
authors: SV
authors: Seitaridis
authors: Helen J
authors: HJ
authors: Mahera
mesh_terms: D018771:Arthralgia / Q000209:etiology; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000601:surgery; D003452:Cryosurgery; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010017:Osteoma, Osteoid / Q000175:diagnosis* / Q000601:surgery; D010329:Patella / Q000601:surgery