case_images: PMC7125469_01
case_images: Transverse colon mass seen on abdominoplevic scan and PET-scan (FDG).
case_images: CRIS2020-6935834.001.jpg
case_images: PMC7125469_01_CRIS2020-6935834.001.jpg
case_images: fig1
case_images: A positron-emission tomography (PET) scan revealed a hypermetabolic mass adjacent to the wall of the transverse colon (Figure 1).
case_images: Transverse colon mass during colonoscopy.
case_images: CRIS2020-6935834.002.jpg
case_images: PMC7125469_01_CRIS2020-6935834.002.jpg
case_images: fig2
case_images: A colonoscopy was then performed, and a 3 cm indurated lesion was noted in the transverse colon (Figure 2).
case_images: Follow-up abdominoplevic CT scan revealing a suspicious enlarged 2 cm mesenteric lymph node and PET-scan showing a high FDG uptake of the enlarged mesenteric lymph node.
case_images: CRIS2020-6935834.003.jpg
case_images: PMC7125469_01_CRIS2020-6935834.003.jpg
case_images: fig3
case_images: This lymph node showed hypermetabolism on the PET-scan with a maximum standardized FDG-uptake value (SUV) of 7.1 (Figure 3).
case_images: Hematoxylin and eosin stain, enlarged 20x, lymph node infiltrated with tumor cells and hematoxylin and eosin stain, enlarged 100x, findings suggestive of leiomyosarcoma found within the mesenteric lymph node.
case_images: CRIS2020-6935834.004.jpg
case_images: PMC7125469_01_CRIS2020-6935834.004.jpg
case_images: fig4
case_images: Histopathology showed a neoplastic proliferation of pleomorphic spindle cells arranged in fascicular and storiform patterns, compatible with a leiomyosarcoma (Figure 4).
case_images: Hematoxylin and eosin stain, enlarged 100x, vascular involvement of the tumor within the mesenteric lymph node.
case_images: CRIS2020-6935834.005.jpg
case_images: PMC7125469_01_CRIS2020-6935834.005.jpg
case_images: fig5
case_images: One lymph node out of seven (1/7) was found to harbor a metastatic focus, which seemed to stem from adjacent vascular invasion (Figure 5).