GCG and metastasis: To control liver metastases, surgery is the first choice if at least 30% of the liver will remain and if there is no evidence of unresectable extrahepatic metastases or, in unresectable cases, hepatic artery embolization, radiofrequency ablation and cryoablation have been reported [83]: Myrehaug et al. reported a case of metastatic glucagonoma treated with radiation therapy which decreased the size of the liver metastasis and the serum level of glucagon level [84]; in a patient reported by Yu, CT‐guided microwave ablation was performed to treat multiple low‐density hepatic lesions [85].