CTICasesMultiple Hereditary Exostoses with Rib and Scapular Osteochondromas
Imaging findings
Chest radiograph and CT show a highly dense, calcified expansile bone lesion with a prominent cartilaginous cap arising from a posterior rib in the chest wall, and a second osteochondroma arising from the scapula. Radiographic surveys of the pelvis demonstrate similar exostoses arising from the pelvis and deformities of the bilateral femoral necks.
Key takeaways
Multiple hereditary exostoses is an autosomal dominant skeletal disorder characterized by the development of multiple osteochondromas. While these benign, cartilage-capped bone tumors typically stabilize once skeletal maturity is reached, they can continue to cause symptoms or, rarely, undergo malignant degeneration into chondrosarcoma, necessitating surgical resection.
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