Figure 4
Keywords: Hidradenocarcinoma, Histopathology-image, Pathology
Hidradenocarcinoma may arise within a pre-existing hidradenoma. Hidradenocarcinomas are often large nodular dermally based tumours which may invade the subcutaneous fat (figure 1) and irregularly infiltrate the surrounding dermis (figure 2). The tumour cells are epithelioid and may often show clear cell changes (figure 3), or may appear basaloid, or have an eosinophilic cytoplasm (figure 1). There may be foci of squamous differentiation and duct formation (figure 2). There may be necrosis (figure 4).
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