**Core Concept**
Ureterocele is a congenital anomaly characterized by the cystic dilation of the terminal ureter, leading to obstructive uropathy and potential renal damage. The treatment of choice aims to relieve the obstruction, preserve renal function, and maintain urinary continence.

**Why the Correct Answer is Right**
The treatment of choice for ureterocele is surgical intervention, specifically endoscopic incision or resection of the ureterocele. This approach allows for the direct visualization of the ureterocele and the affected ureter, enabling the surgeon to relieve the obstruction and restore normal ureteral patency. The procedure can be performed through a cystoscope, minimizing the risk of complications and promoting a faster recovery.

**Why Each Wrong Option is Incorrect**
**Option A:** Open surgical repair is an outdated approach that carries a higher risk of complications, including increased bleeding, infection, and prolonged recovery time.
**Option B:** Conservative management, including antibiotics and analgesics, is ineffective in treating ureterocele, as it does not address the underlying obstruction.
**Option C:** Retrograde ureteral stenting may provide temporary relief but is not a definitive treatment for ureterocele, as the stent may become dislodged or obstructed.

**Clinical Pearl / High-Yield Fact**
Endoscopic treatment of ureterocele is generally preferred over open surgery due to its minimally invasive nature and lower risk of complications.

**Correct Answer: C. Endoscopic incision or resection of the ureterocele.**