Osseous lesions of the distal ulna: atypical location - unusual diagnosis - Report of three cases with similar imaging and different pathologic diagnoses

Three cases with destructive bone lesions of the distal end of the ulna cau sed by different pathologic entities (Ewing's sarcoma, osteosarcoma, rheuma toid pseudotumoral synovitis) are presented, all with similar clinical and: comparable x-ray and magnetic resonance imaging features. Although the dist al end of the ulna may be resected without significant functional impairmen t, careful evaluation of treatment strategies compatible with oncologic sta ndards is warranted.