title: An opportunistic infection with Corynebacterium pyogenes producing empyema.
mesh_terms: D000230:Adenocarcinoma / Q000150:complications; D000328:Adult; D001431:Bacteriological Techniques; D001943:Breast Neoplasms / Q000150:complications; D003352:Corynebacterium / Q000302:isolation & purification / Q000378:metabolism / Q000472:pathogenicity*; D004653:Empyema / Q000209:etiology / Q000382:microbiology*; D005260:Female; D006801:Humans