case_images: PMC11330923_01
case_images: CT scan, coronal view showing large rectal mass.
case_images: gr1.jpg
case_images: PMC11330923_01_gr1.jpg
case_images: fig1
case_images: Initial computed tomography scan showed a 7.1 x 7.4 x 12.5 cm mass in the rectum, without evidence of obstruction or metastasis (Figure 1).
case_images: Large, protruding rectal mass discovered on physical examination.
case_images: gr2.jpg
case_images: PMC11330923_01_gr2.jpg
case_images: fig2
case_images: Digital rectal examination showed a pedunculated rectal mass at the dentate line, which was extruded under anesthesia at the time of colonoscopy, however unable to be reduced (Figure 2).
case_images: [40X magnification] Spindle cell neoplasm shows transmural involvement of rectum with near complete effacement of microanatomy including the muscularis propria, submucosa, muscularis mucosa, and lamina propria. A focal area of retained lamina propria is seen here.
case_images: gr3.jpg
case_images: PMC11330923_01_gr3.jpg
case_images: fig3
case_images: Pathology showed a mitotically active spindle cell neoplasm with transmural involvement (H&E 40x) of the rectal wall (Figure 3).