title: [Patellar hypertrophy: rare abnormality associated with a multiple epiphyseal dysplasia].
abstract: Multiple epiphyseal dysplasia is a genotypic chondrodystrophy characterized by an abnormal shape of numerous epiphyses. Diagnosis is usually made during childhood on an abnormal gait and a reduction of joint mobility associated with radiological changes of the ossification centres. This observation reports on a woman who only consulted at adulthood. Diagnosis was based on a short stature, slight shortening of the extremities and precocious osteoarthritis on the radiographs. Lateral x-rays of the knees revealed a globular hypertrophy of both patellae. This association has rarely been mentioned. A late fusion of an antero-posterior duplication of the ossification centre of the patella seems to be the most plausible physiopathologic hypothesis. Persistence of both ossification centres could result in a coronal double-layered patella, which is also occasionally observed in patients with multiple epiphyseal dysplasia.
authors.affiliation: Service de Rhumatologie, Département de Médecine, Hôpital neuchâtelois, La Chaux-de-Fonds. daniel.vanlinthoudt@ne.ch
authors.forename: D
authors.initials: D
authors.lastname: Van Linthoudt
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006984:Hypertrophy / Q000000981:diagnostic imaging; D051346:Mobility Limitation; D010009:Osteochondrodysplasias / Q000000981:diagnostic imaging*; D010012:Osteogenesis / Q000502:physiology; D010329:Patella / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography