External beam radiotherapy for rectal adenocarcinoma

Area of Science:

• Oncology
• Radiation Oncology

Background:

• Rectal adenocarcinoma presents significant treatment challenges.
• Radiotherapy is a key modality in managing rectal cancer.

Purpose of the Study:

• To evaluate the efficacy of radiotherapy in treating rectal adenocarcinoma.
• To assess the impact of 5-fluorouracil (5FU) combined with radiotherapy.
• To determine factors influencing local tumor control and survival.

Main Methods:

• Retrospective analysis of 243 patients with rectal adenocarcinoma treated with radiotherapy.
• Patients received radical, palliative, or postoperative radiotherapy.
• Radiotherapy was combined with 5FU in the early phase, then given alone.

Main Results:

• Complete tumor regression observed in 38% of radically treated and 24% of palliatively treated patients.
• Long-term local control was better for smaller tumors (<5 cm).
• Postoperative radiotherapy resulted in 58% of patients being free of local recurrence.
• 5FU did not improve survival or tumor control.
• Radiotherapy effectively relieved symptoms associated with pelvic tumors.

Conclusions:

• Radiotherapy is valuable for rectal adenocarcinoma, offering symptom relief and tumor control.
• Tumor size is a critical factor for long-term outcomes.
• The addition of 5FU did not provide additional benefit in this series.