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Extrarenal pelvis
Extrarenal pelvis
Longitudinal sonogram of the right kidney. The extrarenal pelvis (arrow) appears as a dilated proximal ureter. The absence of calyceal dilatation and the fact that the remainder of the ureter is not dilated distinguish this as an extrarenal pelvis.
Courtesy of W Charles O'Neill, MD.
Graphic 75083 Version 2.0