Thoracic imaging with F-FDG PET/CT effectively identifies pulmonary nodules and ThC. FDG-avid pulmonary lesions are significantly more likely to progress than nonavid lesions.

Gallbladder involvement in lymphoma is rare, with only a few cases reported in the literature, predominately in the pre positron emission tomography (PET) era. 18 F-fluorodeoxyglucose ( 18 F-FDG) PET/computed tomography (CT) has now become the modality of choice in the staging of lymphoma. We report a case of gallbladder involvement by high-grade B-cell lymphoma detected by PET/CT.