title: Chondroblastoma of the patella presenting as knee pain in an adolescent.
abstract: We report a case of chondroblastoma of the patella, associated with an aneurysmal bone cyst and pathologic fracture, that presented as knee pain in a 13-year-old girl. This case is the fifth case in the literature that associates patellar chondroblastoma with fracture, which should probably be regarded as a significant feature of this lesion.
authors.affiliation: Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Wolfe
authors.forename: T L
authors.initials: TL
authors.lastname: Halvorson
authors.forename: J T
authors.initials: JT
authors.lastname: Bennett
authors.forename: P C
authors.initials: PC
authors.lastname: Martin
mesh_terms: D000293:Adolescent; D017824:Bone Cysts, Aneurysmal / Q000150:complications; D001859:Bone Neoplasms / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D002804:Chondroblastoma / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D003952:Diagnostic Imaging; D005260:Female; D005598:Fractures, Spontaneous / Q000209:etiology; D006801:Humans; D010146:Pain / Q000209:etiology*; D010329:Patella / Q000473:pathology