case_images: PMC11001544_01
case_images: Pathologic macroscopic image of the tumor surgically excised. Measuring 1.7x1.2 x 1.2 cm.
case_images: IMCRJ-17-289-g0001.jpg
case_images: PMC11001544_01_IMCRJ-17-289-g0001.jpg
case_images: f0001
case_images: Clinically, the attending physician initially thought the lesion could be an epidermal inclusion cyst and performed a surgical excision of the lesion (Figure 1). 
case_images: Higher magnification of the tumor cells highlights the cytologic features of enlarged nuclei, nuclear molding, and scant cytoplasm. Numerous mitotic figures and apoptotic cells are seen. (Hematoxylin-eosin, original magnification x20).
case_images: IMCRJ-17-289-g0002.jpg
case_images: PMC11001544_01_IMCRJ-17-289-g0002.jpg
case_images: f0002
case_images: Histopathologic examination showed a tumor comprised of cells with large, angulated, pleomorphic, hyperchromatic nuclei with nuclear molding, granular chromatin, and scant cytoplasm (Figure 2).
case_images: Tumor cells show positive, dot-like, staining for cytokeratin 20. (Immunohistochemical stain, original magnification x20).
case_images: IMCRJ-17-289-g0003.jpg
case_images: PMC11001544_01_IMCRJ-17-289-g0003.jpg
case_images: f0003
case_images: The immunohistochemical evaluation showed the tumor cells to stain positive for pancytokeratin (dot-like), CK20 (dot-like) (Figure 3), CD56 (Figure 4), and synaptophysin.
case_images: Tumor cells show diffuse positive staining for CD56. (Immunohistochemical stain, original magnification x20).
case_images: IMCRJ-17-289-g0004.jpg
case_images: PMC11001544_01_IMCRJ-17-289-g0004.jpg
case_images: f0004
case_images: The immunohistochemical evaluation showed the tumor cells to stain positive for pancytokeratin (dot-like), CK20 (dot-like) (Figure 3), CD56 (Figure 4), and synaptophysin.