title: Dermatofibrosarcoma protuberans arising in a site of multiple immunizations.
mesh_terms: D000328:Adult; D005354:Fibrosarcoma / Q000209:etiology*; D006801:Humans; D007114:Immunization / Q000009:adverse effects*; D008297:Male; D012782:Shoulder; D012878:Skin Neoplasms / Q000209:etiology*