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Figure 6 (A) Spiradenoma: a lobulated mass composed of multiple nests of small basophilic cells, admixed with squamoid cells and clear cells, with hyalinised basement membrane. (B) Spiradenoma, high power: focal ductal differentiation is evident (arrow). (C) Spiradenocarcinoma: cellular atypia and increased mitotic activity. The lesion is seen adjacent to benign spiradenoma.
