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Abstract We report the case of a 25-year-old man who was undergoing follow-up for neurofibromatosis type 1. The man underwent 68 Ga-DOTATOC PET/CT for a suspected well-differentiated duodenal neuroendocrine tumor. This examination did not reveal any significant uptake, whereas complementary 18 F-FDG PET/CT showed moderate 18 F-FDG uptake in the primary tumor as well as the adenopathy. Histology, a well-differentiated duodenal neuroendocrine tumor was confirmed, consistent with the diagnosis of somatostatinoma. Although rare, this well-differentiated neuroendocrine tumor should be kept in mind as a possible source of false-negative somatostatin receptor PET/CT findings.
Moreau et al. (Tue,) studied this question.
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