So A, et al. - In order to detect the thoracic lesions and for the prognostic assessment of thoracic lesions in multiple endocrine neoplasia type 1 (MEN 1), experts exploratively analyzed the fluorodeoxyglucose positron emission tomography/computed tomography (¹⁸F-FDG PET/CT) at a tertiary referral hospital between July 2011 and December 2016. It was found that 26.0% cases illustrated pulmonary nodules with multiple nodules identified in nine (18.0%) subjects. Data disclosed that all FDG-avid lesions increased in size vs 11 (42.3%) FDG nonavid lesions. The median doubling time was discovered to be 24.2 months and 48.6 months, respectively for FDG-avid and nonavid nodules. Thus, it was deduced that thoracic imaging with ¹⁸F-FDG PET/CT effectively detected the pulmonary nodules and ThC. The FDG-avid pulmonary lesions exhibited a considerably greater tendency of progressing than nonavid lesions.