## **Core Concept**
Ectopic ureter is a congenital anomaly where the ureter opens at a location other than the normal ureterovesical junction. This condition can lead to various urinary symptoms and complications due to abnormal urine drainage.

## **Why the Correct Answer is Right**
The correct answer, **D. Paradoxical incontinence**, is associated with ectopic ureter because the abnormal opening of the ureter can be located in the urethra or vagina in females, leading to continuous urinary incontinence. This is particularly noted in cases where the ectopic ureter opens distal to the urethral sphincter. The incontinence is termed "paradoxical" because it often occurs despite the presence of a more proximal ureteral obstruction or anomaly.

## **Why Each Wrong Option is Incorrect**
- **Option A: Oliguria** - Oliguria refers to decreased urine production, which is not a direct consequence of the ectopic ureter's location but could be related to associated renal anomalies or obstruction.
- **Option B: Dysuria** - Dysuria, or painful urination, can occur in various urinary tract issues but is not specifically characteristic of ectopic ureter.
- **Option C: Bilateral hydroureter** - While hydroureter (dilatation of the ureter) can occur due to obstruction associated with an ectopic ureter, bilateral involvement is not a defining characteristic specific to ectopic ureter.

## **Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is that ectopic ureters are more commonly associated with **vesicoureteral reflux** and **obstructive uropathy**, leading to complications like urinary tract infections (UTIs) and renal damage if not addressed. Incontinence, particularly in a young child, should prompt investigation for an ectopic ureter.

## **Correct Answer: D. Paradoxical incontinence**