title: Chronic knee pain in a 35-year-old man.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005266:Femoral Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D005269:Femur / Q000000981:diagnostic imaging; D006801:Humans; D007717:Knee; D016403:Lymphoma, Large B-Cell, Diffuse / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D010019:Osteomyelitis / Q000175:diagnosis / Q000473:pathology; D010146:Pain / Q000209:etiology; D011859:Radiography