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类癌又名嗜银细胞癌。1968年Pearse将这些具有摄取胺前体并将其脱竣而转化为活性肽功能的细胞称为APUD（amine precursor uptake and decartoxylation）细胞系统，由此发生的肿瘤称为APUD肿瘤。类癌亦属于APUD肿瘤范围，它可发生于胃、肠、胰腺、胆囊、肺、胸腺、肾、膀胱、卵巢等部位。其中以消化道最多见，占80％~85％；其次为肺，占10％，其余均较少见。我们为了提高对此癌的病理形态学特征的认识，通过HE染色、免疫组化技术，结合临床资料，以诊断依据和鉴别诊断为重点，予以分析。
Carcinoid cancer also known as silver banking. In 1968, Pearse called APUD (amine precursor uptake and decartoxylation) cell system for these cells which have the functions of uptake and elimination of amine precursors into active peptides. The resulting tumors were called APUD tumors. Carcinoid also belongs to the APUD tumor range, which can occur in the stomach, intestine, pancreas, gallbladder, lung, thymus, kidney, bladder, ovary and other parts. Of which the most common digestive tract, accounting for 80% to 85%; followed by the lung, accounting for 10%, the rest are less common. In order to improve the understanding of the pathomorphological features of this cancer, we analyzed it by HE staining, immunohistochemistry and clinical data with emphasis on diagnosis and differential diagnosis.