Parosteal osteosarcoma of a metatarsal with intramedullary invasion.
case_report · Level V
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Abstract
A 70-year-old man presented with increasing swelling of 2 years' duration, on the dorsal aspect of the forefoot. Imaging studies revealed a heavily calcified surface lesion of bone with early invasion of the underlying second metatarsal. Both imaging findings and the subsequent resection histology were consistent with a parosteal osteosarcoma, which is particularly rare at this site and at this age. The differential diagnosis of a mineralizing surface lesion of bone arising in the foot is discussed.
Medical subject headings
- Bone Neoplasms
- Metatarsal Bones
- Osteosarcoma
- Periosteum
Anatomy
- foot