Preoperative irradiation for unresectable rectal and rectosigmoid carcinomas

Area of Science:

• Oncology
• Surgical Oncology
• Radiation Oncology

Background:

• Rectal and rectosigmoid cancers present significant treatment challenges, particularly when unresectable.
• Preoperative radiation therapy (RT) is a strategy explored to improve outcomes for these advanced tumors.

Purpose of the Study:

• To evaluate the efficacy of preoperative radiation therapy (RT) in patients with unresectable rectal and rectosigmoid carcinoma.
• To assess the impact of RT on tumor resectability, survival rates, and patterns of failure.

Main Methods:

• Retrospective review of 25 patients with unresectable rectal/rectosigmoid carcinoma treated with preoperative RT.
• Analysis of resectability rates, rates of curative resection, survival data, and treatment failure patterns.

Main Results:

• 80% of patients with initially unresectable tumors became resectable after RT.
• 64% of patients underwent curative resections, with 2- and 5-year survival rates of 56% and 43%, respectively.
• Patients with unresectable tumors post-RT had a median survival of 11 months; 71% of treatment failures had pelvic disease recurrence.

Conclusions:

• Preoperative RT enhances resectability for advanced rectal cancers but does not eliminate the need for aggressive management.
• Pelvic recurrence is a significant issue, correlated with pathologic stage, resection extent, and RT dose.
• Further investigation into more aggressive treatment strategies and alternatives is warranted for these advanced cases.