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Calyceal diverticulum mimicking simple parapelvic cyst: a case report
Yong-han Peng1, Wei Zhang1, Xiao-feng Gao1
1Department of Urology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China.
Summary
Calyceal diverticulum, a rare kidney anomaly, can be challenging to diagnose. Combining retrograde urography with CT and MR urography reliably identified this condition in a patient.
Area of Science:
- Urology
- Radiology
- Medical Imaging
Background:
- Calyceal diverticulum is a rare renal anomaly characterized by a cystic cavity within the kidney.
- Its incidence is low, affecting 0.2% to 0.6% of patients undergoing renal imaging.
- Differentiating calyceal diverticulum from other cystic renal diseases using a single imaging modality is often difficult.
Observation:
- A 60-year-old male presented with symptoms requiring renal imaging.
- Initial imaging may not have been definitive in diagnosing the calyceal diverticulum.
- The patient underwent a combination of diagnostic imaging techniques.
Findings:
- Retrograde urography provided detailed visualization of the collecting system and the diverticulum's communication.
- Non-enhanced computed tomography (CT) offered cross-sectional anatomical information.
- Magnetic resonance urography (MRU) provided further anatomical detail and functional information without ionizing radiation.
- The combined approach allowed for reliable diagnosis of calyceal diverticulum.
Implications:
- This case highlights the diagnostic utility of combining retrograde urography with non-enhanced CT and MRU for calyceal diverticulum.
- Accurate diagnosis is crucial for appropriate patient management and to differentiate from other cystic renal pathologies.
- Advanced imaging combinations can improve diagnostic confidence in rare genitourinary anomalies.
