Is local excision adequate therapy for early rectal cancer?

Area of Science:

• Colorectal Surgery
• Surgical Oncology
• Gastrointestinal Oncology

Background:

• Radical surgery for rectal cancer can cause significant morbidity, including permanent colostomy for low-lying lesions.
• Local excision has shown promise for tumor control in early rectal cancer.
• Comparing treatment outcomes for early rectal cancer is crucial for patient management.

Purpose of the Study:

• To compare recurrence and survival rates between local excision and radical surgery for early rectal cancer.
• To evaluate the efficacy of transanal excision versus radical surgery in treating T1 and T2 rectal adenocarcinomas.
• To determine the impact of surgical approach on local recurrence and overall survival.

Main Methods:

• A retrospective comparison of 108 patients treated with transanal excision and 153 patients treated with radical surgery for T1/T2 rectal adenocarcinomas.
• Neither group received adjuvant chemoradiation.
• Follow-up averaged 4.4 years for local excision and 4.8 years for radical surgery.

Main Results:

• Five-year local recurrence rates were 28% for local excision vs. 4% for radical surgery (p<0.001).
• Overall recurrence rates were 21-47% for local excision vs. 9-16% for radical surgery.
• Five-year overall survival rates were 69% for local excision vs. 82% for radical surgery, with significant differences for T2 tumors (p<0.05).

Conclusions:

• Local excision of early rectal cancer is associated with a high risk of local recurrence.
• Salvage surgery is feasible for most local recurrences but may be less effective for T2 tumors.
• Radical surgery is recommended for T2 rectal cancers to improve overall survival compared to local excision.