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Ｃｕｂｉｌｌａ等１９７７年首先描述乳腺原发性类癌，以后Ａｚｚｏｐａｒｄｉ等发表了一系列文章提出乳腺类癌的形态学、组化和免疫组化特点与诊断。乳腺类癌的发病率很低，Ｈａｒｔｇｒｉｎｋ等统计，占乳腺恶性肿瘤的１．６％，占全身ＡＰＵＤ系统肿瘤的１％以下，而乳腺癌
Cubilla et al. first described primary breast carcinoids in 1977, after which Azzopardi et al. published a series of papers that suggested morphological, histochemical and immunohistochemical features and diagnosis of breast carcinoids. The incidence of breast carcinoid is very low, Hartgrink statistics, accounting for 1.6% of breast cancer, accounting for less than 1% of systemic APUD system tumors, and breast cancer