Indian Journal of Radiology Indian Journal of Radiology  

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Year : 2013  |  Volume : 23  |  Issue : 1  |  Page : 81-85
Appearances of the circumcaval ureter on excretory urography and MR urography: A single-center case series

Department of Radiodiagnosis, Jawharlal Institute of Post Graduate Medical Education and Research, Pondicherry, India

Correspondence Address:
Prakash Muthusami
Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala 695 011
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-3026.113621

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Objectives: To describe Magnetic Resonance Urography (MRU) appearances of the circumcaval ureter, a rare congenital cause of hydronephrosis. Materials and Methods: Seven cases of circumcaval ureter, suspected on intravenous urography (IVU), underwent subsequent static MRU using heavily T2-weighted sequences. Results: The various appearances of circumcaval ureter on IVU and MRU were studied and compared. The circumcaval portion of the ureter was especially well seen on axial MRU sections, though this portion was routinely not visualized on IVU. In one case with a ureteric calculus, MRU also depicted a circumcaval course of the ureter, thus providing a complete diagnosis. In yet another case, where a circumcaval ureter was suspected on IVU, MRU proved the actual cause of ureteric obstruction to be a crossing vessel. Conclusion: Static MRU using heavily T2-weighted coronal and axial sequences can make or exclude the diagnosis of circumcaval ureter unequivocally.

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