<s>[INST] As per the CT Scan of KUB without IV contrast - NO Calculi in right kidney. Mild to moderate degree dilatation of pelvicalyceal system and proximal ureter noted on right side with evidence of small (6.8mm) calculus in right proximal ureter. No calculi/hydronephrosis noted in left kidney - Is this require any surgery or can get rid off with medicines. Does it require immediate action. Kindly clarify [/INST] Hello and welcome to HCM.The CT scan report suggests a stone between the right kidney and bladder.This can be treated medically, for about 7-10 days. If the stone doesn't cause recurrent severe pain episodes, fever, bleeding,vomitting, etc. If it does cause these symptoms,just stenting and medical treatment is also possible,as the size is 6.8mm. Medical treatment is intake of about 15 glasses liquids daily in adults.Anti-spasmodics,and smooth muscle relaxants.Repeat the ultrasound scan at 2 weeks, then decide further treatment.You may send the report to me, for my expert opinion, as a direct question.Dr.Matthew J.Mangat. </s>