Diagnosis by Resolution: Ultrasound Follow-Up of Neonatal Polypoid Cystitis Mimicking Botryoid Rhabdomyosarcoma.
Davide Meneghesso, Mattia Pasquinucci, Martina Bruniera et al.
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Case in brief
A 16-day-old male presented with hematuria and blood clots, with urinalysis revealing pyuria and a positive urine culture for Escherichia coli. Ultrasound showed bladder-wall thickening and an 8-mm polypoid lesion, raising suspicion for botryoid rhabdomyosarcoma. A conservative treatment with antibiotics and ultrasound follow-up led to complete normalization of the bladder within 12 days.
Diagnostic / clinical pearl
In stable neonates with bladder masses, ultrasound follow-up can aid in diagnosis by demonstrating resolution, helping to differentiate between benign inflammatory conditions and malignancy.
Why it matters
This case highlights the importance of conservative management and monitoring in neonates, potentially reducing the need for invasive procedures when benign conditions are suspected.