Hi Sir This Sakthi From Tanjore.... My Husband Working In

hi sir this sakthi from tanjore.... my husband working in oman 2 days back he suffer with stomach pain and back pain...then he is admitted in hostipal..they done scan and urine and they found kindey stone.
when say the report they mentioned(impression) as LT renal mild pelvicalyectasis probably dueto descent of ureteric calculus ....
pls explain whats does mean and then they did not mention the size of stone why