case_images: PMC4747482_01
case_images: Low power photomicrograph of the anal lesion. It shows the necrotic tumor comprising of proliferating stromal cells with peripheral palisading (Hematoxylin and Eosin stain; original magnification x 40)
case_images: PAMJ-22-161-g001.jpg
case_images: PMC4747482_01_PAMJ-22-161-g001.jpg
case_images: F0001
case_images: The microscopic examination showed complete replacement of the tissue by a focally necrotic tumor that comprised proliferating stromal cells with peripheral palisading (Figure 1).
case_images: (A): Immunohistochemical stain patterns showing strong positivity for c-kit; (B): and moderate positivity for SMA (original magnification x 40)
case_images: PAMJ-22-161-g002.jpg
case_images: PMC4747482_01_PAMJ-22-161-g002.jpg
case_images: F0002
case_images: Other immunohistochemical staining patterns reveal Ki-67 (6-8%) while protein S-100 and Pan CK were negative (Figure 2, Figure 3, Figure 4).
case_images: (A): Immunohistochemical stain patterns showing negativity for Pan CK; (B): and protein S 100 (original magnification x 40)
case_images: PAMJ-22-161-g003.jpg
case_images: PMC4747482_01_PAMJ-22-161-g003.jpg
case_images: F0003
case_images: Other immunohistochemical staining patterns reveal Ki-67 (6-8%) while protein S-100 and Pan CK were negative (Figure 2, Figure 3, Figure 4).
case_images: Immunohistochemistry for Ki-67 showing some nuclear positivity (original magnification x 40)
case_images: PAMJ-22-161-g004.jpg
case_images: PMC4747482_01_PAMJ-22-161-g004.jpg
case_images: F0004
case_images: Other immunohistochemical staining patterns reveal Ki-67 (6-8%) while protein S-100 and Pan CK were negative (Figure 2, Figure 3, Figure 4).