title: Red, cup-shaped nodule.
authors.affiliation: University of Arizona Health Sciences Center, Tucson, USA.
authors.forename: N
authors.initials: N
authors.lastname: Levine
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D007636:Keratoacanthoma / Q000175:diagnosis*; D008297:Male; D012871:Skin Diseases / Q000175:diagnosis*