Colon Mobilization in Colorectal Surgery: Techniques & Purpose

Colon mobilization is the surgical dissection of the colon from its peritoneal attachments to allow tension‑free resection, anastomosis, or repositioning.

Anatomic Attachments Released

• White line of Toldt (lateral peritoneal reflection) – medial to lateral dissection.
• Mesentery / mesocolon: Vascular pedicles preserved (ileocolic, right colic, middle colic, left colic, sigmoidal).
• Phrenicocolic ligament (splenic flexure).
• Adhesions from prior surgery/inflammation.

Standard Mobilization Sequences

Right Colon

1. Incise white line of Toldt from cecum to hepatic flexure.
2. Dissect in avascular plane between mesocolon and retroperitoneum.
3. Identify/protect duodenum, ureter, gonadal vessels.
4. Ligate ileocolic, right colic, middle colic vessels at origin (central vascular tie).

Transverse Colon

• Divide gastrocolic ligament (greater omentum).
• Mobilize off pancreas; identify middle colic vessels.

Left Colon / Splenic Flexure

1. Incise white line of Toldt to splenic flexure.
2. Splenic flexure mobilization: Divide phrenicocolic ligament; careful near spleen (capsular tears → hemorrhage).
3. Ligate left colic, sigmoidal vessels.

Sigmoid / Rectum

• Mesosigmoid taken to origin (inferior mesenteric artery ± high tie).
• Total mesorectal excision (TME) for rectal cancer.

Key Principles

• Sharp dissection in avascular planes.
• Preserve marginal artery (Drummond) and arcade (Riolan).
• Hemostasis before proceeding.
• Assess perfusion (ICG fluorescence) before anastomosis.