Abstract
A 74-year-old male patient with a history of nausea, vomiting, and loss of appetite revealed thickening of the antrum and pylorus in gastroscopy and non-mucinous adenocarcinoma was diagnosed in the biopsy. The patient underwent 18F-FDG PET/CT for staging. PET/CT showed intense FDG uptakes in the primary lesion, locoregional lymph nodes and liver metastases. After 5-fluorouracil based chemotherapy, a complete metabolic response in metastatic liver lesions, lymph nodes, and the primary tumor was detected. Furthermore, tumor calcifications were observed in the liver and locoregional lymph node metastases. Although a complete response, there was a 40 percent serum CA 19-9 level increase. During the follow-up, intense FDG uptake was observed in the calcified metastatic liver lesions and some lymph nodes, similar to the continuous increase in serum CA 19-9 levels. Ascites, multiple metastatic lung nodules and metabolic progression in liver lesions were observed on PET/CT in the patient who continued to receive chemotherapy.
Published Version
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