The patient gave a past medical history of left renal stone for which he underwent left pyelolithotomy with double-J stent insertion.

Generally, stents are left for 3-6 months in conditions like obstructive uropathy to maintain the free passage of urine from the kidney to the bladder. If long term stents are required regular replacement is required.

This patient didn't come for follow up until he had symptoms of forgotten double J stent and also develop a new calculus secondary to pyelectasis and stagnation.