Pathological transverse comminuted fracture of the mid to distal diaphysis of the humerus is noted with surrounding oedema. The fracture passes through a central intramedullary lesion that measures approximately 7.5cm craniocaudally which occupies most of the cross sectional diameter of the humerus with slight expansion of the bone and thinning of the cortex. Margins are well defined with a narrow zone of transition, without bony oedema proximal or distal. The lesion is high T2 signal with speckled areas of low T2 signal - I note on the X-ray the lesion shows flecks of calcification in a rings / arcs pattern. No gross associated soft tissue mass. Enhancement is noted in the lesion.
Pathological fracture of the right humerus through a solitary intramedullary lesion. X-ray is usually more specific than MRI in this setting, but the overall impression is of a low grade chondroid lesion (enchondroma or low grade chondrosarcoma). Further assessment is difficult given the pathological fracture.