[A case report of locally recurrent rectal cancer after low anterior resection that led to a pathological complete response to neoadjuvant chemoradiotherapy].

We report a case of low anterior resection that led to a pathological complete response of locally recurrent rectal cancer to neoadjuvant chemoradiotherapy. A 57-year-old male patient underwent low anterior resection for rectal cancer pathologically diagnosed as type 2, tub2>tub1,pSS,INF b,int,ly2,v2,pPM0,pDM0,no,M0,H0,P0, and fStage II. After 2 years and 11 months, local recurrence of his rectal cancer was identified by colon fiberscopy. Neoadjuvant chemoradiotherapy was conducted with CPT-11, UFT/LV, and radiation(50 Gy),and this recurrent lesion exhibited a partial response to the chemoradiotherapy regimen according to magnetic resonance imaging findings. Then, we performed total pelvic exenteration, and the pathological examination revealed a pathological complete response.