Abstract
Abstract Background Extranodal lymphoma can be the primary presentation or secondary to systemic involvement of lymphoma. Positron emission tomography with computer tomography (FDG-PET/CT) is useful in detecting extranodal sites during staging, treatment response assessment or recurrence detection in patients with lymphoma. Objective To demonstrate the PET/CT imaging appearances of extranodal lymphoma. Methods A descriptive retrospective study, conducted at Ain Shams University hospitals on 40 Patients with different types of lymphoma enrolled in this study over a period of six months starting from December 2018 to May 2019 at Ain shams university hospitals. Results The 40 patients involved in this study showed 58 extranodal lesions in 19 different extra-lymphatic sites, where the most frequently impacted sites were bone and bone marrow (20.7%) while supraglottic larynx, oesophagus and para vertebral sites are the least affected (1.7% each). Conclusion Knowledge of the imaging appearances of extranodal lymphoma can aid in the differential diagnosis of mass lesions encountered in tissues throughout the body on PET/CT.
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