Lymphoma, mainly non-Hodgkins lymphoma, may be extranodal in origin in approximately 40% of patients. Extranodal involvement may also be due to regional spread of nodal disease or he-matogenous dissemination [1]. FDG positron emission tomography (PET) imaging has been shown to be an important technique for both staging and follow-up of nodal and extranodal lymphoma [2]. PET-CT systems, which enable the performance of PET and CT data acquisition at the same setting without changing the patients positioning, have been recently introduced in clinical practice [3]. Lesions are characterized on the fused PET-CT images by both their metabolic status and their anatomic details. Such fusion can also assist in the differentiation of physiologic and tumoral sites of FDG uptake. Our aim is to show the use of FDG PET-CT imaging in extranodal lymphoma involving various structures and organs. The relevant CT, PET, and fused PET-CT images of each illustrative case will be presented.