A child with recurrent urinary tract infections is most likely to show:
**Core Concept**
The question is testing the concept of vesicoureteral reflux (VUR), a condition where urine flows retrogradely from the bladder to the kidneys, increasing the risk of urinary tract infections (UTIs) and renal scarring. VUR is often diagnosed in children with recurrent UTIs and is associated with an increased risk of pyelonephritis.
**Why the Correct Answer is Right**
The correct answer is likely related to the presence of VUR, which can be diagnosed using voiding cystourethrogram (VCUG). In VUR, the ureteral orifice is incompetent, allowing urine to flow back into the ureter and then into the renal pelvis. This can lead to renal scarring and pyelonephritis, which are complications of UTIs. The presence of VUR is a significant risk factor for recurrent UTIs in children.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not specified and cannot be evaluated.
**Option B:** This option is also not specified and is not relevant to the diagnosis of VUR or recurrent UTIs.
**Option C:** This option is incorrect because while pyelonephritis is a possible complication of UTIs, it is not the most likely diagnosis in a child with recurrent UTIs. Pyelonephritis is an infection of the renal pelvis and is often associated with systemic symptoms such as fever and flank pain.
**Clinical Pearl / High-Yield Fact**
Children with recurrent UTIs are at increased risk of renal scarring and should undergo further evaluation with VCUG to diagnose VUR. This is because VUR is a significant risk factor for renal scarring and pyelonephritis.
**Correct Answer:** C.