I am not certain whether figures 13 and 14 contain any tumor cells, but the remaining figures show a malignancy with epithelioid cytologic appearance and vaguely papillary architecture around blood vessels. I think this is a case of melanoma (primary or metastatic is unclear), but would use immunohistochemistry to confirm or exclude it.

 恶黑

 同意Dr.mjma和wfbjwt医生的诊断。诊断：恶性黑色素瘤。

图中在低倍下显示的乳头状结构可能是人工假象。从图8到图12可见上皮样异型细胞，弥漫中有成巢趋势；图片13和14显示有黑色素沉积。

这个肿瘤发生的部位靠近鼻前庭，恶黑成立。IHC做一做对诊断更加可靠。标记S-100、Melanin A、HMB45确诊，并标记CKpan、CK8、CK5鉴别其他上皮来源。