High-Grade Transformation (Dedifferentiation) of Acinic Cell Carcinoma of the Parotid Gland: Report of an Unusual Variant

<div>(a) Hematoxylin and eosin stain illustrating a low-grade acinic cell carcinoma at the bottom juxtaposed to a high-grade carcinoma, simulating a salivary duct carcinoma with central necrosis. (b) An area of high-grade transformation demonstrating an infiltrating tumor with extensive central necrosis.</div>

Case Reports in Otolaryngology

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Figure 1

Figure 1: High-Grade Transformation (Dedifferentiation) of Acinic Cell Carcinoma of the Parotid Gland: Report of an Unusual Variant 