A 58-year-old man with locally advanced rectal cancer (T3N1M0) undergoes long-course neoadjuvant chemoradiotherapy. Post-treatment MRI at 12 weeks shows complete clinical response (cCR). According to the Brazilian 'Watch and Wait' protocol (Habr-Gama), which strategy is recommended?
- A Immediate radical surgery (TME) to confirm pathological complete response
- B Local transanal excision to verify cCR histologically before final decision
- C Non-operative management (observation) with strict surveillance endoscopy and MRI every 3 months for 2 years ✓
- D Adjuvant systemic chemotherapy alone without surgery
Explanation
The 'Watch and Wait' (W&W) strategy, pioneered by Habr-Gama et al., applies to rectal cancer patients achieving clinical complete response (no residual tumour on endoscopy, MRI, and CT) after chemoradiotherapy. Patients are managed non-operatively with intensive surveillance (digital rectal examination, endoscopy, and MRI every 3 months in the first 2 years), avoiding radical surgery and its associated morbidity including permanent colostomy. About 20-30% develop local regrowth, most of which are salvageable surgically. Immediate surgery abandons potential organ preservation without confirming pathological response. This approach is currently endorsed by international guidelines for carefully selected patients with sustained cCR.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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Written and medically reviewed by the StethoPrep medical team.