title: Metastasizing keratoacanthoma vs. squamous cell carcinoma.
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology*; D009362:Neoplasm Metastasis; D012878:Skin Neoplasms / Q000473:pathology*