[A Case of Colorectal Cancer with Anaphylactic Shock to Oxaliplatin].

We present the case of a 61-year-old woman with cecum cancer, ileal and multiple hepatic metastases, and peritoneal dissemination. Surgery (right hemicolectomy) was performed on December 2013. After surgery, 7 courses of mFOLFOX6 plus bevacizumab were administered. In May 2014, 4 minutes after starting the 8th course of oxaliplatin, dyspnea, nausea, vomiting, and general malaise were observed. Oxaliplatin administration was immediately discontinued and an injection of an antiemetic drug was administered, but the patient's blood pressure dropped to 87/53 mmHg and the SpO2 decreased to 87% (room air). The patient showed facial pallor; oxygen administration was initiated. Although blood pressure recovered to 124/69 mmHg 3 minutes after oxygen administration, reddening of the palms, pruritus, and headache were observed. The dyspnea eased 8 minutes after oxygen administration, the SpO2 recovered 18 minutes after oxygen administration, and the headache ceased. The patient subsequently was admitted to the hospital for observation, but no significant change was observed, and she was discharged the following day. Anaphylaxis due to oxaliplatin occurring after the 6th course is commonly reported, and the symptoms in this case were comparable to those described in the literature.