Tumor markers: CA 19.9=42 (≤37 U/ml), CEA=4.9 (<5.0ng/ml)

Colonoscopy: Ulcerated mass in the descending colon, 45-50 cm from the anal verge.  

Procedure: Radical transverse colectomy with left hemicolectomy:

Histopathology: Mucinous (colloid) adenocarcinoma, (low-grade). The tumor measures 7 cm in the greatest dimension. Additional dimensions are 5 x 1.5 cm. Tumor invades through the muscularis propria to the pericolonic fat. All margins are negative. No metastasis is seen in the submitted 14 regional lymph nodes (0/14).

Comment: The tumor is classified as pT3, pN1c, pMx because there are multiple deposits in the pericolonic fat in the subserosa without regional lymph nodes infiltration.