[Congenital megacalycosis]

Area of Science:

• Urology
• Pediatric Nephrology
• Medical Imaging

Background:

• Megacalycosis is a rare congenital renal anomaly characterized by diffuse enlargement of the renal calyces.
• It is crucial to differentiate megacalycosis from other conditions like obstructive or refluxing hydronephrosis, which may require surgical intervention.
• Early and accurate diagnosis is essential for appropriate patient management.

Observation:

• A case of megacalycosis was identified in a newborn presenting with multiple congenital anomalies and enlarged kidneys.
• Various uroradiological techniques, including computed tomography (CT) and ultrasound, were employed for evaluation.
• Excretory urography proved to be the most effective imaging modality for demonstrating the characteristic features of megacalycosis.

Findings:

• The excretory urogram revealed enlarged kidneys with uniform dilatation of all renal calyces.
• The remainder of the collecting system appeared normal.
• Voiding cystourethrography results were normal, and renal function tests were within normal limits.

Implications:

• Accurate diagnosis of megacalycosis prevents misdiagnosis as obstructive or refluxing hydronephrosis.
• Avoiding unnecessary surgical procedures in cases of megacalycosis is crucial for patient well-being.
• This case highlights the importance of specific imaging techniques in diagnosing rare pediatric urological conditions.