title: Malignant skin tumors presenting as seborrheic keratosis.
mesh_terms: D002280:Basal Cell Carcinoma / Q000175:diagnosis*; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis*; D012628:Dermatitis, Seborrheic / Q000175:diagnosis*; D003951:Diagnostic Errors; D006801:Humans; D007642:Keratosis / Q000175:diagnosis*; D008545:Melanoma / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000175:diagnosis*