Calyceal diverticulum

Case contributed by Dr Wen Jak Ma

Presentation

Recurrent left renal angle pain

Patient Data

Age: 35
Modality: CT

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.

Modality: CT

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: 10th Sep 2015
System: Urogenital
Inclusion in quiz mode: Included

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