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. 2022 Mar 3;2:825891. doi: 10.3389/fnume.2022.825891

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Copyright © 2022 Purbhoo and Vangu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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15 year old male with stage 3 Hodgkin's lymphoma referred for follow up FDG PET post chemotherapy. Coronal PET (B), and PET/CT (C) showing bilateral symmetrical uptake in the neck and paravertebral region of the cervical and thoracic spine. Crosshairs localized to fat density on CT (A). FDG uptake in brown adipose tissue is commonly seen in children and adolescents. Many pediatric patients have mild brown fat uptake in the neck or supraclavicular regions. However, intense uptake may include pericardiac and perirenal brown adipose tissue. ¹⁸F-FDG uptake in activated brown fat may obscure sites of pathologic FDG uptake and decrease confidence in the interpretation of the study.