Specimen: Rectoigmoid colon with attached mesocolon and lymph nodes.
Histologic type: Adenocarcinoma.
Grade: Poorly differentiated (Grade 3).
Tumor invasion: Extends through muscularis propria into pericolonic adipose tissue
Lymphovascular invasion: Present.
Perineural invasion: Not identified.
Tumor budding: Intermediate.
Margins: All resection margins negative for tumor.
Lymph Nodes
Pathologic Stage (AJCC 8th Edition – Colon)
Large fungating ulcerated mass, 15 cm from the anal verge, previously diagnosed Poorly differentiated adenocarcinoma, grade 3, (3930-2026) on 13 June 2026.
Colonic segment measuring 30 cm long with attached mesenteric fat measuring 20 x 5.5 x 3 cm. Opening revealed a solid, firm, creamy-colored mass measuring 6 x 4.5 x 3.3 cm. The mass was located 3.5 cm away from the proximal margin and 20 cm away from the distal margin.
Dissection of mesenteric fat revealed 28 lymph nodes, with the largest measuring 1.3 cm in its greatest dimension.
Rectosigmoid colon, segmental resection: