Transcaval Ureter: Multidetector Computed Tomography Demonstration

Chrisafi, Sofia; Racchiusa, Sergio; Magno, Carlo; Inferrera, Antonino; Donato, Rocco; Mucciardi, Giuseppe; Mazziotti, Silvio; Ascenti, Giorgio

doi:10.1016/j.urology.2015.03.029

Cited by 1 publication

(3 citation statements)

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“…In accordance with the human literature, all dogs and cats included in this study reported a right-sided distribution of the transcaval ureter ( 8 – 11 ). Only patient number 3 had limited clinical signs related to the urinary system, consistent with hematuria which is also reported in human medicine ( 8 , 9 ).…”

Section: Discussionmentioning

confidence: 58%

“…Contrast-enhanced multidetector computed tomography (MDCT) for detecting and characterizing CVC anomaly is recommended due to the excellent visualization of the CVC and its relationship with the ureters ( 5 ). Transcaval ureter is a rare embryological abnormality of the inferior vena cava (IVC) rarely described in human medicine, in which a segmental duplication of this vessel creates a venous ring that encircles the right ureter ( 8 – 11 ). There are few reports on transcaval ureter in human medicine, and different theories about its embryological development were formulated ( 2 , 8 – 11 ).…”

Section: Introductionmentioning

confidence: 99%

“…Transcaval ureter is a rare embryological abnormality of the inferior vena cava (IVC) rarely described in human medicine, in which a segmental duplication of this vessel creates a venous ring that encircles the right ureter ( 8 – 11 ). There are few reports on transcaval ureter in human medicine, and different theories about its embryological development were formulated ( 2 , 8 – 11 ). According to the supracardinal model, transcaval ureter arises when the right posterior cardinal and right supracardinal veins fail to regress in post-renal segment, resulting in a partial duplication of IVC that creates a venous ring through which the right ureter extends.…”

Section: Introductionmentioning

confidence: 99%

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Computed tomographic appearance of transcaval ureter in two dogs and three cats: A novel CVC congenital malformation

Spediacci

Longo

Specchi³

et al. 2022

Front. Vet. Sci.

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Transcaval ureter is a rarely reported human congenital malformation of the prerenal segment of the inferior vena cava (IVC) not yet reported in veterinary medicine. The objective of this multicenter retrospective case series study was to describe the computed tomography (CT) features of transcaval ureters in dogs and cats. Patients referring to pre- and post-contrast CT exams of the abdomen and presenting this abnormality were retrospectively included. Multiple qualitative features were described for each ureteral abnormality detected. Three cats and two dogs with transcaval ureter were identified consisting of a segmental duplication of the CVC at the prerenal level creating a vascular ring through which the ureter extended, identified as a double-barrel gun sign. The malformation was divided into two types according to the symmetry of the caval branches and location in relation to the aorta, namely, type I symmetrical branches and right-lateral to the aorta, and type II asymmetrically branches and right-dorsal to the aorta. In one case, the malformation was associated with hydroureter and mild pyelectasis. In three cases, the anomaly was incidental and, in the remaining two cases, the clinical significance was uncertain. This is the first study describing the presence of transcaval ureter in dogs and cats. CT was a suitable method for the diagnosis of transcaval and a focal double-barrel gun sign of the CVC is proposed as the hallmark feature of this anomaly. The clinical relevance of this congenital vascular malformation is unclear and needs to be further investigated.

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Section: Discussionmentioning

confidence: 58%