CT
Left kidney is grossly enlarged in size measuring 25X20cm. There is gross dilatation of left renal pelvis and calyceal system with a thinning of the renal cortex. The dilated left renal pelvis is even extending across the midline. Left ureter could not be visualised.Multiple thin incomplete parenchymal septae are seen in the left kidney. The renal cortex appears as hypoenhancing rim suggestive of rim sign.
The dilated left kidney is abutting, compressing and displacing the stomach and pancreas towards right side, transverse colon anteriorly and spleen more superiorly.
No obvious excretion of contrast seen.
Non-enhancing grossly hydronephrotic left kidney with dilated renal pelvis and severe thinning of renal cortex as described could be secondary to pelviureteric junction obstruction.