Painless lump on the left lower thigh.
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An osseous outgrowth arising from the medial aspect of the distal femur and directed upwards (away from the joint), its cortex appears continuous with that of the femur.
2 case question available
This is a typical case of osteochondroma, typical clinical presentation (age of patient, painless lump), typical location (femur is the most affected bone), typical appearance (pedunculated bony outgrowth that directed away from the joint).
Osteochondromas are the most common bone tumors in children, may be solitary or multiple. The true prevalence of solitary osteochondromas is not known, because many asymptomatic lesions go undiagnosed. A painless skeletal swelling or a slowly growing mass is the usual mode of presentation.
Most osteochondromas, solitary or multiple, arise from tubular bones and are metaphyseal in location.
- Murphey MD, Choi JJ, Kransdorf MJ et-al. Imaging of osteochondroma: variants and complications with radiologic-pathologic correlation. Radiographics. 2000;20 (5): 1407-34. doi:10.1148/radiographics.20.5.g00se171407 - Pubmed citation
- Bernard SA, Murphey MD, Flemming DJ et-al. Improved differentiation of benign osteochondromas from secondary chondrosarcomas with standardized measurement of cartilage cap at CT and MR imaging. Radiology. 2010;255 (3): 857-65. doi:10.1148/radiol.10082120 - Pubmed citation
- Woertler K, Lindner N, Gosheger G et-al. Osteochondroma: MR imaging of tumor-related complications. Eur Radiol. 2000;10 (5): 832-40. Pubmed citation