<s>[INST] hello sir, i have a small kidney in measures 73 * 34 mm, with slightly irregular contour.corticomedullary differentiation is maintained.mild fulness of pelvicalyceal system noted.no evidence of calculus seen.and my right kindney normal in size,work propley. sir,what can i d [/INST] Hello and welcome to Chat Doctor. As a Urologist, let me advise you that a small kidney, means it has reduced in size.  There are various reasons for the same. Irregular contour means the normal shape and border of kidney, is altered, usually due to chronic infections. Fullness of urinary system within the kidney is seen, which suggests slow Chat Doctor. You can clear any other doubt, by directing the question in my name here. Wish you well. </s>