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8.46mm calculus in right upper ureter with mild hydronephrosis

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can this stone pass through ureter and by urine?have pain in lower right abdomen.no sign of blood in urine.6mm stone pass through ureter before 8 yrs.
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replied February 6th, 2011

Hello, and thanks for your medical question on eHealthForum.

The likelihood that a ureteral stone will pass appears to be determined by its size (i.e., greatest diameter).

As stones increase in size beyond 4 mm, the need for urologic intervention increases exponentially.

Since you have had a earlier stone of 6mm pass out, conservative approach with hydration therapy can be used for 2-3 weeks to allow the stone to move out. About 25 % of stones greater than 5mm usually pass out without any need for any interventions.

Presence of hydronephrosis and a stone of 8.46 mm may need to be monitored very closely and if symptoms remain persistent or increase in severity, or there is worsening of renal functions you may need referral to a urologist and may require additional interventions for stone removal.

I hope this helps.


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