Figure 2.
Basal cell carcinoma within hidradenitis suppurativa lesions. (A) Clinical appearance of the basal cell carcinoma in Patient 4: ulcerated plaque with irregular and pigmented borders and scarred surrounding tissue. (B, C) Areas of basal cell carcinoma nests along margins of a sinus (H&E, ×10). (D) Multiple nests composed of basaloid cells, and peripheric cleft (H&E, ×40).