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Classification of metaplastic carcinoma.
| Purely epithelial |
| Squamous |
| Large cell keratinizing |
| Spindle cell |
| Acantholytic |
| Adenocarcinoma with spindle cell differentiation |
| Adenosquamous, including mucoepidermoid |
| Mixed epithelial and Mesenchymal (specify components) |
| Carcinoma with chondroid metaplasia |
| Carcinoma with osseous metaplasia |
| Carcinosarcoma (specify components) |
