Published online Aug 16, 2023. doi: 10.12998/wjcc.v11.i23.5554
Peer-review started: April 10, 2023
First decision: June 12, 2023
Revised: June 25, 2023
Accepted: July 25, 2023
Article in press: July 25, 2023
Published online: August 16, 2023
Processing time: 128 Days and 5 Hours
Jackstone is a rare entity of calculi in urinary tracts and has the characteristic appearance resembling toy jacks. They are nearly always reported to occur in the urinary bladder, we first report a rare case of jackstone located in the obstructed renal calyx.
We report a 46-year-old man presenting with intermittent, painless gross hematuria and left flank pain. Urinary computed tomography revealed staghorn stones and secondary hydronephrosis. A jackstone with radiating branches was found in one of the dilated renal calyx. Percutaneous nephrolithotomy was performed and endoscopic images were recorded during the operation. Posto
Jackstones can occur in the renal collecting system besides the bladder. The unique appearance and imaging manifestations are the most important factors in the diagnosis of jackstones, and further exploration of the formation mechanism is required.
Core Tip: As a rare entity, jackstone with the characteristic appearance resembling toy jacks is usually found in the urinary bladder. This study discusses a rare case of a jackstone in a hydronephrotic renal calyx which had never been described before. Jackstones are commonly composed of calcium oxalate monohydrate or calcium oxalate dihydrate. The exact pathophysiology of jackstone development remains poorly understood. Outflow obstruction may be the most common cause. Thus, when removing the stones, the obstruction should also be evaluated and treated to avoid recurrence.