The term “karzenoide” initially was used to describe a class of intestinal tumors that appear more homogenous and have a slower growth rate than intestinal adenocarcinomas. Carcinoid tumors now are known to comprise a spectrum of neoplasms that originate from neuroendocrine cells. They are considered “APUDomas” because they have the capacity for amine precursor uptake and decarboxylation, and may produce biologically active amines or peptides. The incidence of carcinoids in the United States is ∼7–15 per million per year. Nearly half of patients have metastatic disease evident at the time of diagnosis, and the overall 5-year survival rate is ∼50%.
KeywordsCarcinoid Tumor Compute Tomog Carcinoid Syndrome Gastric Carcinoid Rectal Carcinoid
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