title: Sudden intraoperative hypotension in a patient with asymptomatic urticaria pigmentosa.
mesh_terms: D000230:Adenocarcinoma / Q000601:surgery; D000368:Aged; D000769:Anesthesia, Inhalation; D004737:Enflurane; D005260:Female; D006801:Humans; D007022:Hypotension / Q000209:etiology*; D007431:Intraoperative Complications; D008415:Mastocytosis / Q000150:complications*; D009609:Nitrous Oxide; D010111:Oxymorphone; D012004:Rectal Neoplasms / Q000601:surgery; D014582:Urticaria Pigmentosa / Q000150:complications*
chemical_list: D004737:Enflurane; D010111:Oxymorphone; D009609:Nitrous Oxide