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Figure 10a. UPJO in a 24-year-old man. (a) Coronal MPR image shows the inverted teardrop shape of right UPJO with a dilated extrarenal pelvis (arrowhead) and a transition point in the region of the ureteropelvic junction (arrow). (b) Coronal MIP image shows two right renal arteries (arrowheads) with the dilated extrarenal pelvis in between (arrow). (c) Oblique sagittal hilar clock-face view shows the relationship of the renal vein and main renal artery (arrowhead), the dilated extrarenal pelvis (short arrow), and the variant lower-pole artery (long arrow). Note that the crossing vessel is above the point of caliber transition.
