%0 Case Reports %T [A Case of Radical Resection after Neoadjuvant Chemotherapy for Rectal Cancer with Pelvic Abscess]. %A Osaki M %A Takahashi Y %A Tokuyama S %A Kawai K %A Matsui Y %A Toshiyama R %A Yamamoto M %A Sakai K %A Takeno A %A Gotoh K %A Miyazaki M %A Takami K %A Hirao M %A Kato T %J Gan To Kagaku Ryoho %V 50 %N 13 %D 2023 Dec %M 38303359 暂无%X A 66-year-old man with a history of frequent diarrhea was diagnosed with rectal cancer with obstruction and a pelvic abscess. Following a transverse colostomy, he was referred to our hospital. The initial diagnosis was rectal cancer(cT4a N1bM0, cStage Ⅲb)and a pelvic abscess due to tumor perforation. To address this condition, we performed neoadjuvant chemotherapy using a combination of 5-fluorouracil, Leucovorin, oxaliplatin, and irinotecan(FOLFOXIRI). Following 6 courses of FOLFOXIRI, the abscess disappeared and no signs of tumor progression and distant metastases were detected. Subsequently, we performed radical resection with D3LD2 lymph node dissection, leading to a pathological diagnosis of ypT3N1aM0, ypStage Ⅲb. The patient then underwent adjuvant chemotherapy with capecitabine and oxaliplatin(CAPOX). No recurrence was observed after 9 months of follow-up.