title: Keratoacanthoma in a smallpox vaccination site.
mesh_terms: D005260:Female; D006801:Humans; D007636:Keratoacanthoma / Q000209:etiology*; D008875:Middle Aged; D012867:Skin / Q000382:microbiology; D012900:Smallpox Vaccine / Q000009:adverse effects*; D014611:Vaccination / Q000009:adverse effects; D014616:Vaccinia virus / Q000302:isolation & purification
chemical_list: D012900:Smallpox Vaccine