Colloid carcinoma (CC) of the pancreas, also known as mucinous noncystic carcinoma, is a rare histological variant of pancreatic cancer which had been included in the past under the category of ordinary ductal carcinoma, a tumor with a dismal prognosis, or was frequently misdiagnosed as mucinous cystadenocarcinoma. As CC has a better prognosis than pancreatic ductal carcinoma, early detection of CC by 18 FDG PET SCAN is of great value for the therapeutic management of patients. We report the case of a 66-year-old patient who underwent 18 FDG PET SCAN as part of a post-therapy evaluation of a moderately differentiated carcinoma of the stomach treated with surgery and chemotherapy, in whom a hypermetabolic focus of the body of the pancreas was discovered incidentally. The anathomopathological diagnosis was in favor of a low-grade mucinous noncystic carcinoma of the pancreas. Thus, 18 FDG PET SCAN allowed the discovery of an infraradiological CC synchronous with a gastric adenocarcinoma and provided information on its metabolic activity as well as locoregional and distant staging, which are important prognostic markers and which could improve the therapeutic management of the patient. (C) 2021 Elsevier Masson SAS. All rights reserved.
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