<unk>  is rare. It is most often seen in people in their 20s and 30s. Combined with subungal exostosis, it accounts for less than 5% of cartilage tumors. Males and females are affected equally.
Bizarre parosteal osteochondromatous proliferation
Palisaded encapsulated neuroma
Terminal osseous dysplasia with pigmentary defects
Progressive osseous heteroplasia
Proliferating epidermoid cyst
Malignant chondroid syringoma
Intradermal spindle cell lipoma
Acral myxoinflammatory fibroblastic sarcoma