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Updated: Jan 30, 2026

Determining Glucose Metabolism Kinetics Using 18F-FDG Micro-PET/CT
Published on: May 2, 2017
Dynamic Renal Ptosis Demonstrated on 18F-FDG PET/CT
Justin Taylor1, Kalpna Prasad, Rebecca Rohrer
1From the Nuclear Medicine Service, Department of Radiology, Walter Reed National Military Medical Center, Bethesda, MD.
Abstract:
Renal ptosis, otherwise known as nephroptosis or "floating kidney," is a condition of abnormal descent of the kidney, often asymptomatic with controversy over its clinical and therapeutic significance. The aberrant location of renal and renal collecting system activity associated with this condition may serve as a diagnostic pitfall in PET/CT interpretation. We report a case of dynamic renal ptosis demonstrated on F-FDG PET/CT, identified as right kidney migration from an ectopic location on attenuation correction CT images, obtained immediately after upright positioning, to the right renal fossa on subsequent PET images, obtained after approximately 10 min of supine positioning.
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