title: Ultrasonography of a plexiform neurofibroma of the popliteal fossa.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D007717:Knee; D008297:Male; D009456:Neurofibromatosis 1 / Q000175:diagnosis* / Q000473:pathology; D014463:Ultrasonography