title: Atypical malignant round cell tumour of the femur.
abstract: We report an atypical case of malignant round cell tumour in a 25-year-old man who presented with pain in the left hip of insidious onset and long duration of about 1½ years. Radiologically, the tumour was meta-epiphyseal in location with sparing of the diaphysis and showed a defined, narrow zone of transition. These appearances are contradictory to the well documented classical features of malignant round cell tumours, which usually present with a short history, are meta-diaphyseal in location, and appear ill-defined with a wide zone of transition due to infiltration of the adjacent bone.
authors.affiliation: Department of Radiology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal. drnatashagupta@gmail.com
authors.forename: Natasha
authors.initials: N
authors.lastname: Gupta
authors.forename: Asis
authors.initials: A
authors.lastname: Karak
authors.forename: Awadhesh
authors.initials: A
authors.lastname: Tiwari
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D005269:Femur; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018242:Neuroectodermal Tumors, Primitive / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography; D012512:Sarcoma, Ewing / Q000000981:diagnostic imaging / Q000473:pathology*