外阴肿物表面怎样被覆粘液腺上皮?

部位错了？或罕见病例？

请指明肿块具体部位。

 这个息肉似乎形成分叶状结构，因此担心腺纤维瘤。

颈管内膜息肉

支持！

腺纤维瘤（adenofibroma）.

 全称叫宫颈乳头状腺纤维瘤。

如下是从Pathologyoutlines.com找到的：

Papillary adenofibromaof cervix

Uncommon in cervix, more common in endometrium. Usually post-menopausal women.
Gross: protrudes into endocervical canal; papillary or sessile, may be 5 cm or larger; firm, rubbery, tan-brown with focal hemorrhage; may have small cysts on cut surface; no invasion of underlying stroma.
Micro: lobulated papillary configuration; blunt edged and branching papillae covered by bland endocervical epithelium with stromal proliferation; may have focal squamous differentiation; stromal cells are small, uniform, bland; no/rare mitotic figures; no increased cellularity around entrapped glands.
DD:
1. endocervical polyps: not branching, no stromal proliferation。
2. adenosarcoma: increased mitotic figures in stroma and stromal atypia.

 息肉