Results of immunostains:

Tumor cells were immunoreactive for EMA, Ber-Ep-4, CK7, and AE1/3 with variable positive stains for Androgen receptor, CK8/18, and Vimentin, but were negative for S100, HMB45, CK20, TTF-1, RCC, and PSA.

Sebaceous carcinoma with apocrine differentiation

Reference:

1.      Wang B, Sarma DP. Sebaceous carcinoma with apocrine differentiation. The Internet Journal of Dermatology. 2006. Volume 4 , Number 2.