title: Spontaneous osteonecrosis of the distal femur.
authors.affiliation: Department of Orthopaedics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Ecker
mesh_terms: D000328:Adult; D005269:Femur; D006801:Humans; D007719:Knee Joint; D008279:Magnetic Resonance Imaging; D010020:Osteonecrosis / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D011379:Prognosis