21. Some sources have also termed these pancreatic carcinoid , a practice that has sometimes been strongly condemned. 22. It may also result from alterations in protein metabolism in disorders such as carcinoid syndrome or Hartnup disease. 23. Other less common liver cancers include carcinosarcomas, teratomas, yolk sac tumours, carcinoid tumours and lymphomas. 24. Alternatively, the flushing and diarrhea observed in carcinoid syndrome is caused by elevated levels of circulating serotonin. 25. DSRCT in young patients can be mistaken for other abdominal tumors including rhabdomyosarcoma, neuroblastoma, and mesenteric carcinoid . 26. Upon surgical resection, histologically the nodules are found to be typical carcinoids or carcinoid tumorlets depending on size. 27. Upon surgical resection, histologically the nodules are found to be typical carcinoids or carcinoid tumorlets depending on size. 28. The symptoms can be so severe that they, not the carcinoid tumors themselves, are the cause of death. 29. Niacin synthesis is also deficient in carcinoid syndrome, because of metabolic diversion of its precursor tryptophan to form serotonin. 30. Patients with Midgut Carcinoid disease ( MGC ) commonly receive neurokinin A test to determine the progression of their disease.
