Calyceal diverticulum

Case contributed by Dr Wen Jak Ma


Recurrent left renal angle pain

Patient Data

Age: 35

Large left renal cystic lesion with dependent calculus. Progressive contrast fill-in with time - corticomedullary phase, 10min excretory, 60min, 24hours. Last picture is noncontrast CT 1 year later - shows that an extra calculus has developed. Findings in keeping with calyceal diverticulum and stasis calculi.


Small left renal cystic lesion with posterior calcifications. It was initially diagnosed as Bosniak Class 2 cyst. Careful windowing shows that those calcifications are likely dependent calculi instead. This would suggest this lesion being a calyceal diverticulum.

Case Discussion

Learning points:

1. Very delayed excretory phase (1-24hr) will help confirm diagnosis if in doubt.

2. Careful windowing to examine the dependent calcifications will help show that those are calculi rather than mural.

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Case information

rID: 35610
Case created: 14th Apr 2015
Last edited: 23rd Jun 2017
System: Urogenital
Inclusion in quiz mode: Included

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