Interesting ImagesRetroperitoneal Liposarcoma on 99mTc-DTPA Renal ScintigraphyChen, Haotian MD; Wei, Jing MD; Wang, Rang MD; Xiang, Yongzhao BS; Fan, Chengzhong MDAuthor Information From the Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China. Received for publication May 27, 2019; revision accepted September 10, 2019. H.C., J.W., and R.W. contributed equally to this work and shared joint first authorship. Conflicts of interest and sources of funding: C.F. received grant from the 1·3·5 project for Disciplines of Excellence–Clinical Research Incubation Project, West China Hospital, Sichuan University (no. 2018HXFH002). None declared to all other authors. Correspondence to: Chengzhong Fan, MD, Department of Nuclear Medicine, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China. E-mail: email@example.com. Online date: December 4, 2019 Clinical Nuclear Medicine: February 2020 - Volume 45 - Issue 2 - p 129-130 doi: 10.1097/RLU.0000000000002854 Buy Metrics Abstract Retroperitoneal liposarcoma is usually large and can press on other organs. We report a case of a 66-year-old woman with a history of retroperitoneal liposarcoma resection who presented to the emergency department with abdominal pain. Ultrasonography revealed a large abdominal mass with renal displacement. Dynamic renal scintigraphy with 99mTc-DTPA was conducted to evaluate renal function. However, severe impairment of the right kidney function and abnormal tracer accumulation were observed during the examination. SPECT/CT was performed; 2 kidneys were successfully localized, and the recurrence of tumor was correctly detected. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.