case_images: PMC10599109_01
case_images: (a) Low magnification (x40) anorectal mucosa invaded by pigmented polypoid proliferation arranged in sheets and thecae. (b) Cells loaded with melanin pigment with, at high magnification, central mitosis and clear cytonuclear atypia (x400).
case_images: 10.1177_2050313X231208529-fig1.jpg
case_images: PMC10599109_01_10.1177_2050313X231208529-fig1.jpg
case_images: fig1-2050313X231208529
case_images: It showed an invasion of the anorectal mucosa by pigmented polypoid proliferation arranged in sheets and thecae (Figure 1) Pelvic magnetic resonance imaging (MRI) demonstrated a 2-cm budding tumor in the anal canal with hyperintensity on T2 acquisition and no local extension, particularly to the mesorectum and sphincter complex (Figure 2).
case_images: Magnetic resonance imaging showing a 2-cm budding tumor of the anal canal with no local extension.
case_images: 10.1177_2050313X231208529-fig2.jpg
case_images: PMC10599109_01_10.1177_2050313X231208529-fig2.jpg
case_images: fig2-2050313X231208529
case_images: It showed an invasion of the anorectal mucosa by pigmented polypoid proliferation arranged in sheets and thecae (Figure 1) Pelvic magnetic resonance imaging (MRI) demonstrated a 2-cm budding tumor in the anal canal with hyperintensity on T2 acquisition and no local extension, particularly to the mesorectum and sphincter complex (Figure 2).
case_images: Intraoperative findings of the tumor located on the dentate line with an implantation base of 8 mm.
case_images: 10.1177_2050313X231208529-fig3.jpg
case_images: PMC10599109_01_10.1177_2050313X231208529-fig3.jpg
case_images: fig3-2050313X231208529
case_images: Intraoperatively, a 3-cm tumor with an 8-mm implantation base was found at the dentate line (Figure 3).
case_images: Wide local excision of the tumor.
case_images: 10.1177_2050313X231208529-fig4.jpg
case_images: PMC10599109_01_10.1177_2050313X231208529-fig4.jpg
case_images: fig4-2050313X231208529
case_images: A WLE was executed, maintaining a 5-mm healthy tissue margin from the internal sphincter (Figure 4).