[Transverse Colon Cancer with Peritoneal Metastasis Successfully Treated with mFOLFOX6 plus Bevacizumab-A Case Report].

A male patient in his 80s, diagnosed with rectal cancer, underwent transverse colon resection(pT3, pN0, cM0, and pStage Ⅱa, RAS wild-type, BRAF-mutant). However, 19 months later, intraperitoneal metastasis was detected and the patient received 8 courses of mFOLFOX6 plus bevacizumab. Following the observation of an allergic reaction that was attributable to oxaliplatin, the regimen was changed to a total of 7 courses of sLV5FU2 plus bevacizumab. Subsequently, a marked decrease was observed in intraperitoneal metastasis. The patient completed sLV5FU2 plus bevacizumab chemotherapy. At 1 year after the marked decrease, the metastatic recurrence was not exacerbated.