18F-FDG PET/CT Imaging in Sarcomatoid Hepatocellular Carcinoma.

Sarcomatoid hepatocellular carcinoma is a rare subtype of hepatocellular carcinoma. We present a 53-year-old man with a hepatic IV/VIII segment neoplasm whose tumor markers were all in the reference range. The neoplasm presented intense uptake of 18F-FDG and was confirmed as sarcomatoid hepatocellular carcinoma by immunohistochemistry. After 6 cycles of PD-1 treatment, no recurrence or metastasis was found by follow-up CT over 2 years. Thus, we reported a case of sarcomatoid hepatocellular carcinoma with complete remission to PD-1 treatment and provided some help for the diagnosis and treatment of sarcomatoid hepatocellular carcinoma.