is enlargement of kidney.It can be due to many causes.
Please take IVP(Intra venous pyelogram) to know the kidney's function before going for CT scan.
Get Blood urea and Serum creatinine
Nothing to worry
IF you come back with IVP report,i will clarify further.
Till then,please take Norfloxacin
tablet along with Dicyclomine and mefenamic acid
Wish you good health