page_title: Carcinoid syndrome
section_title: Localization of tumour
hierarchical_section_title: Carcinoid syndrome / Diagnosis / Localization of tumour
caption_attribution_description: English: I am a doctor, working in operation room for more than fifteen years. I also have pictures of metastasis of this tumor. Diagnosis was confirmed by histopathology. This work is not copyright,I hereby release it into the public domain. This applies worldwide.
context_page_description: Carcinoid syndrome is a paraneoplastic syndrome comprising the signs and symptoms that occur secondary to carcinoid tumors. The syndrome includes flushing and diarrhea, and less frequently, heart failure, vomiting and bronchoconstriction. It is caused by endogenous secretion of mainly serotonin and kallikrein.
context_section_description: Tumour localization may be extremely difficult. Barium swallow and follow-up examination of the intestine may occasionally show the tumor. Capsule video endoscopy has recently been used to localize the tumor. Often laparotomy is the definitive way to localize the tumour.
  Another form of localizing a tumor is the Octreoscan. A tracer agent of Indium 111 is injected into a vein where then the tumors absorb the radionuclide Indium 111 and become visible on the scanner. Only the tumors absorb the somatostatin agent Indium 111 making the scan highly effective.
caption: Primary site of a carcinoid cancer of gut; secondaries are also visible on the mesentery
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