Low Anterior Resection (LAR) Surgery

What is Low Anterior Resection?

LAR is surgical removal of tumor-bearing rectum while preserving anal sphincter and bowel continuity. Standard procedure for mid and upper rectal cancers. Maintains normal bowel function in most patients. Requires complete mesorectal excision (TME) for optimal oncological outcomes.

Indications for LAR

• Mid and upper rectal cancer (5-12 cm from anal verge)
• Benign rectal tumors
• Familial adenomatous polyposis
• Strictures from radiation
• Diverticular disease

Pre-operative Assessment

• Colonoscopy and biopsy
• Pelvic MRI for staging
• Endorectal ultrasound
• CT staging
• Neoadjuvant therapy if Stage II-III

Surgical Technique

Total Mesorectal Excision (TME)

Removes rectum with surrounding mesorectal tissue as oncological unit. Preserves autonomic nerves for sexual and urinary function. Creates anastomosis between proximal colon and distal rectum.

Laparoscopic vs Open

Laparoscopic approach preferred when feasible with equivalent oncological outcomes and better recovery.

Recovery Timeline

• Hospital Stay: 2-4 days (laparoscopic), 5-7 days (open)
• Return to Light Work: 2-3 weeks
• Full Recovery: 6-12 weeks

Bowel Function After LAR

Most patients achieve acceptable bowel function. Initially 4-6 bowel movements daily, improving to 2-3 over 3-6 months. 90% continence at 6-12 months post-op. Quality of life excellent in majority.

Success Rate

Local recurrence <5% with TME. Overall survival rates: Stage I 85-90%, Stage II 70-75%, Stage III 45-65%. Complications <5% with experienced surgeon.

Cost Estimate

Accurate estimate can be obtained from hospital while visiting the doctor.

Related Conditions

• Rectal Cancer
• Colorectal Cancer

Contact Charak Hospital

Phone: 05226664444

Dr. Ashok Kumar

Surgical Gastroenterologist

• MCh - SGPGI
• FRCS
• FACS
• FASCRS