Diagnostic value of 18F-FDG PET/CT for cutaneous extranodal natural killer/T-cell lymphoma, nasal type. Issue 5 (May 2016)

• Record Type: Journal Article
• Authors: Liu, Chang; Zhang, Yingjian; Zhang, Yongping; Wang, Mingwei; Liu, Rui; Liu, Xiaohang; Hu, Silong
• Is Part Of: Nuclear medicine communications. Volume 37:Issue 5(2016:May)
• Publication Date: 2016-05
• Subjects: cutaneous nasal-type NK/T-cell lymphoma -- PET/CT -- staging; Nuclear medicine -- Periodicals; 616.07575
• DOI: 10.1097/MNM.0000000000000463
• Languages: English
• ISSNs: 0143-3636

Abstract

Abstract : Objective: To evaluate the use of fluorine-18 fluorodeoxyglucose ( 18 F-FDG) PET/computed tomography (CT) in the diagnosis of cutaneous extranodal natural killer/T-cell lymphoma, nasal type (C-ENK/T-NT). Methods: A total of 39 patients with newly diagnosed C-ENK/T-NT were enrolled between May 2006 and November 2013. Anatomic regions ( n =429; five cutaneous and six extracutaneous regions per patient) were assessed using an 18 F-FDG PET/CT scan and conventional staging methods (CSMs). 18 F-FDG PET/CT and CSMs were compared and evaluated for their ability to detect tumor lesions and their influence on the staging and treatment strategies. Biopsy and clinical follow-up were used as the gold standard for diagnosis. Results: In total, 139 lesions were detected by CSMs and 18 F-FDG PET/CT, of which there were 50 cutaneous and 89 extracutaneous-positive regions. 18 F-FDG PET/CT detected 48 cutaneous and 88 extracutaneous regions. CSMs, however, detected only 34 cutaneous lesions and 61 extracutaneous lesions that were positive for malignancy (cutaneous comparison of PET/CT vs. CSMs, P <0.001; extracutaneous comparison of PET/CT vs. CSMs, P <0.05). Using 18 F-FDG PET/CT, 8 (42%) patients were in stage I–II and 31 patients (58%) were in stage III–IV. 18 F-FDG PET/CT staging was consistent with the final stage determination in 94.9% (37/39) of patients, whereas CSMs staging was correct in final stage determination in 74.4% (29/39) of patients ( P =0.025). Conclusion: Our study showed that 18 F-FDG PET/CT scanning is a valuable modality for the detection of cutaneous and extracutaneous lesions of C-ENK/T-NT. 18 F-FDG PET/CT may therefore influence future staging and treatment strategies.