<prompt> A patient presented with episodes of flushing and hypotension. His urinary 5HIAA levels were found to be increased. The diagnosis isPheochromocytomaCarcinoid syndromeAddisons diseaseSIADH  <response>: B Carcinoid syndrome Carcinoid syndrome-Clinical findings include: Flushing of the skin Diarrhea and abdominal cramps Right sided heart disease Bronchoconstriction Abdominal pain due to desmoplastic reaction of the mesentery in most patients, increased urinary excretion of 5-HIAA 5-hydroxy-indoleacetic acid, a degradation product of serotonin Serotonin causes fibrosis of the tricuspid valve and pulmonary valve TIPS - Tricuspid Insufficiency, Pulmonic Stenosis fibrosis of tricuspid and pulmonary valves 