Q: Is it possible to have stone in ureter, which is not visible in sonography and urine report? I had 6 mm stone in ureter, which was taken out by the doctor through endoscopy. But I still have some pain in the lower back but the reports are normal. What could be the reason for the pain?

A:Yes, usually ureteric stones are more symptomatic, small in size and hence may not be seen on x-rays or ultrasound. IVP is the best method to pick up block due to stone or any dilatation of the urinary tract proximal to the stones. However, simply because you have pain following endoscopic removal of stone in the immediate postoperative period it may not be necessarily because of stone. It could be the effect of instrumentation and swelling or even small particles and this pain should disappear within next 4-6 weeks. In your case if you are not relieved of pain in the specified period, then you must go back to your urologist and in turn he will be able to find the cause of pain and help you out.