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Urodynamic studies in prune belly syndrome. A case report.
Scandinavian Journal of Urology and Nephrology
|January 1, 1979
Summary
Prune Belly Syndrome patients exhibit bladder issues like instability and high capacity. Post-transplant, imbalanced micturition with residual urine suggests detrusor-bladder-neck-dyssynergia as a primary cause.
Area of Science:
- Urology
- Pediatric Nephrology
- Medical Imaging
Background:
- Prune Belly Syndrome (PBS) is a rare congenital disorder characterized by abdominal muscle deficiency, urinary tract abnormalities, and cryptorchidism.
- Patients with PBS often develop end-stage renal disease requiring renal transplantation.
- Urodynamic evaluation is crucial for assessing bladder function in PBS patients.
Observation:
- Urodynamic studies were performed on a 14-year-old boy with PBS before and after renal transplantation.
- Key findings during bladder filling included increased capacity, non-provocative detrusor instability, and high compliance.
- Voiding phase analysis revealed increased detrusor pressure with normal outflow resistance and maximum urinary flow rate.
Findings:
- Post-transplantation, the patient experienced imbalanced micturition with 100 ml of residual urine.
- Urodynamics identified congenital insufficiency of posterior urethral musculature (megalourethra) as the cause of urethral bulging, not mechanical obstruction.
- Detrusor-bladder-neck-dyssynergia is proposed as the primary cause of imbalanced micturition and its sequelae in PBS.
Implications:
- Understanding the urodynamic profile in PBS is vital for managing bladder dysfunction and preventing complications like reflux and hydronephrosis.
- Detrusor-bladder-neck-dyssynergia should be considered in the management of voiding dysfunction in PBS patients.
- Findings contrast with some literature suggesting detrusor muscle attenuation in PBS, highlighting the need for further research.