title: Hoffa's disease: a report on 5 cases.
abstract: We report the case of five patients referred to our department with Hoffa's disease: three patients were at the initial stage of the disease and the two others had reached the chronic stage. This condition is one of the less well-documented causes of pain in the anterior compartment of the knee. The pathophysiological mechanism is still unclear. It is probably caused by repetitive micro trauma resulting in inflammatory, haemorrhagic and fibrous changes to Hoffa's fat pad. The final outcome of the disease is an osteochondroma. The diagnosis is established by MRI, which demonstrates inflammation of the fat pat. At the chronic stage, a standard X-ray is sufficient to demonstrate ossification of the fat pad.
authors.affiliation: Department of Musculoskeletal Imaging, Lapeyronie University Hospital, 371, avenue Gaston-Giraud-Dean, 34295 Montpellier cedex 5, France. Electronic address: ahmed.larbi@uclouvain.be.
authors.forename: A
authors.initials: A
authors.lastname: Larbi
authors.affiliation: Department of Musculoskeletal Imaging, Lapeyronie University Hospital, 371, avenue Gaston-Giraud-Dean, 34295 Montpellier cedex 5, France.
authors.forename: C
authors.initials: C
authors.lastname: Cyteval
authors.affiliation: Department of Orthopaedic Surgery and Traumatology (hip, knee, foot), Lapeyronie University Hospital, 371, avenue Gaston-Giraud-Dean, 34295 Montpellier cedex 5, France.
authors.forename: M
authors.initials: M
authors.lastname: Hamoui
authors.affiliation: Department of Medical Imaging, Bichat Claude Bernard Hospital, 46, rue Henri-Huchard, 75018 Paris, France.
authors.forename: B
authors.initials: B
authors.lastname: Dallaudiere
authors.affiliation: Thoracic and Vascular Imaging, Arnaud de Villeneuve University Hospital, 371, avenue du Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
authors.forename: H
authors.initials: H
authors.lastname: Zarqane
authors.affiliation: Department of Musculoskeletal Imaging, Lapeyronie University Hospital, 371, avenue Gaston-Giraud-Dean, 34295 Montpellier cedex 5, France.
authors.forename: P
authors.initials: P
authors.lastname: Viala
authors.affiliation: Department of Musculoskeletal Imaging, Lapeyronie University Hospital, 371, avenue Gaston-Giraud-Dean, 34295 Montpellier cedex 5, France.
authors.forename: A
authors.initials: A
authors.lastname: Ruyer
mesh_terms: D000273:Adipose Tissue / Q000473:pathology*; D000328:Adult; D018771:Arthralgia / Q000209:etiology*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted; D007592:Joint Diseases / Q000175:diagnosis*; D007719:Knee Joint / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000175:diagnosis; D010329:Patella / Q000473:pathology*; D014057:Tomography, X-Ray Computed / Q000379:methods
keywords: Extra skeletal chondroma; Hoffa's disease; Infrapatellar fat pad; Knee