Hot Quadrate Sign Under Focus of F18-FDG PET-CT: An Incidental Finding Authors Ayesha Zubair Department of Nuclear Medicine, Shaukat Khanum Memorial Cancer Hospital and Research Center, Lahore. Aamna Hassan Department of Nuclear Medicine, Shaukat Khanum Memorial Cancer Hospital and Research Center, Lahore. DOI: https://doi.org/10.47391/JPMA.25-06 Abstract “Hot quadrate lobe sign” refers to visualization of caudate lobe of liver due to excess accumulation of radiotracersecondary to superior vena cava obstruction. Collateral channels are formed between thoracic and mediastinalvessels; internal mammary through the paraumbilical vessels which drain blood to the left portal vein and into thecaudate lobe of liver. It was first described on Tc99-m sulfur colloid scan. We present a case with superior vena cavaobstruction presenting as hot quadrate lobe sign on F18-FDG PET-CT.Keywords: F18-FDG PET-CT, caudate lobe, superior vena obstruction, collateral vessels. Downloads Full Text Article Published 2024-12-23 How to Cite Ayesha Zubair, & Aamna Hassan. (2024). Hot Quadrate Sign Under Focus of F18-FDG PET-CT: An Incidental Finding. Journal of the Pakistan Medical Association, 75(1), 142–143. https://doi.org/10.47391/JPMA.25-06 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Issue Vol. 75 No. 1 (2025): JANUARY Section IMAGING CORNER License Copyright (c) 2024 Journal of the Pakistan Medical Association This work is licensed under a Creative Commons Attribution 4.0 International License.