Obstructive and perforative colonic carcinoma: patterns of failure.

Area of Science:

• Oncology
• Surgical Oncology

Background:

• Colorectal carcinoma with obstruction or perforation is associated with poorer patient outcomes.
• Understanding the natural history and failure patterns is crucial for optimizing adjuvant treatment strategies.

Purpose of the Study:

• To analyze the natural history, failure patterns, and adjuvant treatment implications for colorectal cancer patients with obstruction or perforation.
• To compare outcomes of obstructive and perforative colonic carcinoma with a control group.

Main Methods:

• Retrospective review of Massachusetts General Hospital (MGH) data from 1970-1977.
• Comparison of 77 patients with obstructive colonic carcinoma and 34 with localized perforation against 400 control patients.
• Minimum five-year follow-up for all patients.

Main Results:

• Five-year survival rates were significantly lower for obstructive (31%) and perforative (44%) colonic carcinoma compared to controls (59%).
• Higher rates of local failure (42% obstruction, 44% perforation) and distant metastases (44% obstruction, 44% perforation) were observed compared to controls (14% and 21%, respectively).
• Failure rates increased with tumor stage for both obstructive and perforative cases.

Conclusions:

• Obstruction and perforation in colorectal carcinoma portend a worse prognosis.
• Adjuvant treatment strategies should consider the increased risk of local and distant failure in these complicated cases.
• Stage-specific analysis highlights the aggressive nature of these tumor presentations.