! ORL via Alexandros G.Sfakianakis on Inoreader: False-positive finding of retropharyngeal lymph node recurrence in both fluorine 18FDG PET and MRI in a patient with nasopharyngeal carcinoma

! ORL via Alexandros G.Sfakianakis on Inoreader

False-positive finding of retropharyngeal lymph node recurrence in both fluorine 18FDG PET and MRI in a patient with nasopharyngeal carcinoma Aug 28th 2015, 15:24, by Ming-Chen Tsai, Yu-Chi Shu, Chia-Chen Hsu, Chih-Kung Lin, Jih-Chin Lee, Yueng-Hsiang Chu, Wen-Yen Huang Abstract Background Biopsy of the retropharyngeal node is not routinely accessible. The diagnosis of retropharyngeal lymph node recurrence in patients with nasopharyngeal carcinoma (NPC) is often based on an imaging study. Methods We reported a patient with NPC who was incorrectly diagnosed with left retropharyngeal lymph node recurrence by both MRI and positron emission tomography (PET)/CT. Results A woman who was treated for stage IVA NPC 2 years previously was found to have a nodal lesion in the left retropharyngeal space on MRI together with focal fluorodeoxyglucose (FDG) uptake on PET/CT. Locoregional recurrence was suspected, and surgery was performed. Subsequent pathology results showed reactive lymphoid hyperplasia. Conclusion Although tissue biopsy for the retropharyngeal node is technically difficult, this case demonstrates that tumor recurrence cannot be diagnosed even based on both positive findings on MRI and PET/CT in patients with NPC. © 2015 Wiley Periodicals, Inc. Head Neck, 2015

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