The patient proceeded to an extended right hemicolectomy.

Histopathology report

 DIAGNOSIS:

• Site: Extended right hemicolectomy.
• Type: Moderately differentiated adenocarcinoma.
• Size: 36mm in maximum dimension.
• Local invasion: Tumor extends through muscularis propria into the subserosa. Serosa is clear.
• Lymphovascular invasion: Present.
• Lymph nodes: 3 out of 33 lymph nodes show metastatic tumor. Largest tumor focus 5mm. Extranodal spread seen.
• Margins, proximal and distal: Clear.
• AJCC stage IIIB (T3 N1b M0).