Fig. 9
From: Do not break a sweat: avoiding pitfalls in the diagnosis of sweat gland tumors
Spiradenocarcinoma. This morphologically high-grade example shows a sharp demarcation from the benign spiradenoma (seen on top) to the malignant component in the lower aspect (a). It is composed of sheets of pleomorphic epithelioid cells with brisk and atypical mitotic activity, reminiscent of poorly differentiated carcinoma (b). Tumor necrosis is present (c)
