Coronal contrast-enhanced CT images in the arterial phase which demonstrate features consistent with a left-sided duplex renal collecting system, with two renal pelvises an upper and a lower ureteric moiety.
The left-sided ureteric moieties crossover at a level coinciding with the junction of the upper third and middle third parts of the ureters.
The distal attachments/ anatomy of the two left-sided ureteric moieties is unclear, as a delayed (excretory) phase was not performed.
The right kidney and collecting system is normal in appearance, with no duplex system.