PMC5415293_01
Ultrasonographic longitudinal images of kidneys in this case. (a,b) Ultrasonography showing the upper pole of the left kidney and the lower pole of the right kidney fused with each other. (c,d) The proximal portion of ureters in both kidneys were dilated. LPRK = lower pole of right kidney; UPLK = upper pole of left kidney; UR = ureter.
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PMC5415293_01_10.1177_2055116917695875-fig1.jpg
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An abdominal ultrasound examination showed free fluid in the body cavity and cross-fused kidneys located on the right side from the midline, indicating an ectopic left kidney fused with an orthotopic right kidney (Figure 1a,b). A repeated renal ultrasound revealed that the ureters of both kidneys were dilated, suggesting the presence of hydronephrosis (Figure 1c,d).
(a,b,d) Volume rendering images and (c) dorsal multiplanar reformatted CT images in the nephrographic and excretory phase of the affected cat. (a,b) Volume rendering images show crossed fused renal ectopia on the right side and the presence of two right renal arteries (arrow) from the descending aorta entering the medially facing hilum of fused kidney. (c) Dorsal plane image shows ectopic left kidney placed horizontally anterior to L4 and L5 vertebrae is fusing with the lower pole of the normally placed right kidney. (d) The ureter of the left ectopic kidney crosses the midline and ureterovesical junctions are normally located
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PMC5415293_01_10.1177_2055116917695875-fig2.jpg
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Volume rendering of CT images showed crossed fused renal ectopia on the right side and the presence of two right renal arteries from the descending aorta entering the medially facing hilum of the fused kidneys (Figure 2a,b). A dorsal plane image showed an ectopic left kidney placed horizontally anterior to the L4 and L5 vertebrae that was fused with the lower pole of a normally placed right kidney, indicating L-shaped CFRE (type E; Figure 2c). The renal dimensions (parenchymal thickness) of the superiorly (right) and tandemly (left) situated kidneys were 27 x 36 (8.8) mm and 26 x 32 (8.1)  mm, respectively (Figure 2c). The ureter of the left ectopic kidney crossed over the midline, while ureterovesical junctions were normally located (Figure 2d).