WHO有关乳头状癌的定义是：“A rare carcinoma whose invasive pattern is predominantly in the form of papillary structures.The same architecture is usually displayed in the metastases. Frequently, foci of intraductal papillary growth are recognizable.''and "papillary carcinoma arising , and limited to a mammary cyst, is to be referred to as noninvasive intracystic carcinoma."请大家帮忙翻译一下。

 另一种译法：

乳头状癌是一种罕见的癌，其浸润型（浸润性乳头状癌）主要以乳头状结构为主，并且转移灶内也常为乳头状结构。通常可见到导管内乳头状生长病灶（导管内乳头状癌，原位癌性质）。
起源于并局限于乳腺囊肿内的乳头状癌被称为非浸润性囊内乳头状癌（原位癌性质）。

供参考！