title: Recurrent syncope due to systemic mastocytosis.
mesh_terms: D001241:Aspirin / Q000627:therapeutic use; D001706:Biopsy; D002744:Chlorpheniramine / Q000627:therapeutic use; D002927:Cimetidine / Q000627:therapeutic use; D005260:Female; D006636:Histamine Release; D006801:Humans; D008875:Middle Aged; D012008:Recurrence; D012867:Skin / Q000473:pathology; D013575:Syncope / Q000209:etiology*; D014582:Urticaria Pigmentosa / Q000150:complications* / Q000188:drug therapy / Q000473:pathology
chemical_list: D002744:Chlorpheniramine; D002927:Cimetidine; D001241:Aspirin