A basal cell carcinoma which displays squamous differentiation. The neoplastic cells have more abundant cytoplasm with more marked keratinization than typical basal cell carcinomas. It usually has a more aggressive clinical course compared to typical basal cell carcinoma, and it may produce regional or widespread metastases. The disease is basosquamous carcinoma (MONDO_0003264, a Monarch Disease Ontology id). Also known as: Basisquamous cell carcinoma, basosquamous cell carcinoma, basosquamous tumor, malignant, metatypical carcinoma, metatypical carcinoma (morphologic abnormality), skin basosquamous cell carcinoma, skin mixed basal and squamous cell carcinoma.