Interesting Images18F-FDG PET/CT Imaging of Cauda Equina Syndrome Secondary to Leptomeningeal Metastatic Breast CancerSolnes, Lilja B. MD, MBA; Javadi, Mehrbod S. MD; Rowe, Steven P. MD, PhDAuthor Information From The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD. Received for publication February 10, 2016; revision accepted July 6, 2016. Conflicts of interest and sources of funding: none declared. Correspondence to: Lilja B. Solnes, MD, 601 N. Caroline St., Baltimore, MD 21287. E-mail: [email protected]. Clinical Nuclear Medicine: November 2016 - Volume 41 - Issue 11 - p e485-e486 doi: 10.1097/RLU.0000000000001354 Buy Metrics Abstract Cauda equina syndrome (CES) is an uncommon entity that may be caused by a variety of conditions. It refers to dysfunction of the ventral, dorsal, sacral, and coccygeal nerve roots in the region of the filum terminale. We present a case of a 32-year-old woman with a history of BRCA1-positive metastatic breast cancer who complained of lower extremity muscle weakness increasing over a 2-week period and decreased sensation of the lower extremities accompanied by severe constipation and suspected urinary retention with overflow incontinence. The patient underwent whole-body 18F-FDG PET/CT and MRI of the spine with and without gadolinium-based contrast. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.