类癌是一种比较少见的肿瘤,男性较女性常见,60～70岁易发生类癌,类癌来源于肠嗜铬细胞,这类细胞主要存在于小肠和支气管粘膜内.原发肿瘤常只有1～2cm大,而淋巴结和肝转移灶,则可大得多. 组织化学检查可分为非嗜铬细胞性类癌(肺、直肠、胃)和嗜铬细胞性类癌(十二指肠、其次为小肠、结肠),后者含有分泌素颗粒.另外,还有一种由以上两种成分组成的混合性肿瘤.临床上应用免疫组织化学方法,如嗜铬粒蛋白、白细胞介素-7、神经元特异性 Carcinoid is a relatively rare tumor, more common in men than women, 60 to 70 years old prone to carcinoid, carcinoid cells from the intestinal chromaffin cells, these cells are mainly found in the small intestine and bronchial mucosa. The primary tumor is often only 1 to 2cm in size, but lymph nodes and liver metastases, it can be much larger. Histochemical examination can be divided into non-chromatid cellular carcinoid (lung, rectum, stomach) and chromaffin cell cancer (duodenum) , followed by the small intestine, colon), which contains secretin particles. In addition, there is a mixed tumor consisting of the above two components. Clinically applied immunohistochemistry methods, such as chromogranin, interleukin-7 Neuron specificity