case_images: PMC5446876_01
case_images: (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.
case_images: CRIOT2017-7296467.001.jpg
case_images: PMC5446876_01_CRIOT2017-7296467.001.jpg
case_images: fig1
case_images: Pathology slides were reviewed and revealed acinic cell carcinoma with areas of high-grade transformation (Figures 1(a) and 1(b)).
case_images: Coronal CT image demonstrates the residual parotid tumor (arrow), before the definitive surgery.
case_images: CRIOT2017-7296467.002.jpg
case_images: PMC5446876_01_CRIOT2017-7296467.002.jpg
case_images: fig2
case_images: Computed Tomography (CT) scan of the head and neck showed postoperative fibrotic changes in the area of the right parotid gland (Figure 2).
case_images: Cross section of the nerve showing endoneural invasion by the carcinoma.
case_images: CRIOT2017-7296467.003.jpg
case_images: PMC5446876_01_CRIOT2017-7296467.003.jpg
case_images: fig3
case_images: The final pathology results were in agreement with the preoperative diagnosis of acinic cell carcinoma with high-grade transformation and there was clear evidence of perineural invasion (Figure 3).