title: Beyond the lymph nodes: FDG-PET/CT in primary extranodal lymphoma.
abstract: Extranodal lymphoma can be the primary presentation or secondary to systemic involvement of lymphoma. 2-(fluorine-18) fluoro-2-deoxy-d-glucose 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. In this article, we reviewed the imaging features and FDG avidity of primary extranodal lymphoma of various organs and systems on FDG-PET/CT, demonstrating the pearls and pitfalls of FDG-PET/CT in evaluating this disease entity and cross-referencing to other imaging modalities that aid in diagnosis and management.
authors.affiliation: Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
authors.forename: Kin Man
authors.initials: KM
authors.lastname: Sin
authors.affiliation: Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
authors.forename: Stanton King Dat
authors.initials: SK
authors.lastname: Ho
authors.affiliation: Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
authors.forename: Brian Yung Kong
authors.initials: BY
authors.lastname: Wong
authors.affiliation: Department of Medicine, Queen Mary Hospital, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
authors.forename: Harry
authors.initials: H
authors.lastname: Gill
authors.affiliation: Department of Diagnostic Radiology, Queen Mary Hospital, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
authors.forename: Pek-Lan
authors.initials: PL
authors.lastname: Khong
authors.affiliation: Department of Diagnostic Radiology, Queen Mary Hospital, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong. Electronic address: eyplee77@hku.hk.
authors.forename: Elaine Yuen Phin
authors.initials: EY
authors.lastname: Lee
mesh_terms: D019788:Fluorodeoxyglucose F18; D006801:Humans; D008198:Lymph Nodes / Q000000981:diagnostic imaging / Q000473:pathology; D008223:Lymphoma / Q000000981:diagnostic imaging* / Q000473:pathology; D054391:Lymphoma, Extranodal NK-T-Cell / Q000000981:diagnostic imaging* / Q000473:pathology; D009367:Neoplasm Staging; D000072078:Positron Emission Tomography Computed Tomography / Q000379:methods*; D019275:Radiopharmaceuticals
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18
keywords: Extranodal; FDG-PET/CT; Lymphoma; SUV