Three Cases of Lower Advanced Rectal Cancer Involving Pathological Complete Response after Neoadjuvant Chemoradiotherapy

: Neoadjuvant chemoradiotherapy(NACRT)was administered at our hospital to 3 patients with lower advanced rectal cancer; NACRT resulted in pathological complete response(pCR). Case 1: A 65-year-old man was diagnosed with T4aN1M0, cStage Ⅲb disease; after chemoradiotherapy(CRT), the clinical stage improved to T4aN0M0, ycStage Ⅱb. Laparoscopic Hartmann's procedure and D3 lymph node dissection were performed 51 days after CRT. No recurrence was observed 31 months after surgery. Case 2: A 67-year-old man was diagnosed with T4aN2M0, cStage Ⅲb disease; after CRT, the clinical stage improved to T4aN1M0, ycStage Ⅲa. Laparoscopic abdominoperitoneal resection and D3 lymph node dissection were performed 57 days after CRT. No recurrence was observed 21 months after surgery. Case 3: An 83-year-old woman was diagnosed with T4aN2M0, cStage Ⅲb disease; after CRT, the clinical stage improved to T4aN0M0, ycStageⅡb. Laparoscopic abdominoperitoneal resection and D3 lymph node dissection were performed 64 days after CRT. No recurrence was observed 16 months after surgery. Here, we report 3 cases of lower advanced rectal cancer involving curative resection following CRT, and we provide a short literature review.