CTICasesRib Osteochondroma presenting as Breast Mass
Imaging findings
Ultrasound and CT chest in a young female with a palpable breast mass show a large bone-density lesion arising from a rib. The lesion has a continuous cortex and medullary space (osteochondroma) and projects into the subpectoral space.
Key takeaways
Rib osteochondromas are benign bone tumors. When projecting anteriorly, they can present clinically as a hard, palpable breast mass, prompting ultrasound or mammography. CT is diagnostic by demonstrating cortex and marrow continuity with the underlying rib.
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