Connections of the bladder plate and bladder neck with the bony pelvis in a fetus with classic bladder exstrophy

Histopathology of intersymphyseal band and its correlation with continence in bladder exstrophy repair

Background

Urinary incontinence is a major problem in operated exstrophy patients. Most of the repairs described in literature stress on the importance of dividing the intersymphyseal band (ISB) to place the bladder in the pelvis. But the origin of this band and its importance has hardly been discussed in literature. The purpose of this study is to establish the nature of tissue the ISB is composed of. This can be used to determine its role in the surgical management of exstrophy epispadias complex (EEC) patients.

Results

Thirty out of 33 operated patients demonstrated smooth muscle with/without fibrous tissue in the sections taken through the ISB.

A significant percentage of patients (χ2= 38.319, p < 0.0001) in whom this band was reconstructed around the bladder neck gradually became continent/partly continent with an increase in the dry interval with time.

Conclusion

It can be a considerable factor to pay attention to the step of wrapping the ISB around the bladder neck during EEC repair. This serves to function as the smooth muscle of the bladder neck as proven histologically in our operated patients. It may have a role to support future continence in these patients.

The role of anatomic pelvic dissection in the successful closure of bladder exstrophy: an aid to success

INTRODUCTION

Classic bladder exstrophy is one of the rarest congenital anomalies compatible with life. Surgical treatment of bladder exstrophy has progressed, but the goal of surgery remains a successful primary bladder closure. Several factors have been identified to decrease the risk of failed closure, including appropriate use of osteotomy and adequate postoperative immobilization and analgesia. However, the role of the radical anatomic pelvic dissection, including dissection of the urogenital diaphragm fibers, in a successful closure has not yet been extensively explored.

OBJECTIVE

The objective of this study was go examine the role of radical anatomic pelvic dissection, including dissection of the urogenital diaphragm fibers, in patients with classic bladder exstrophy.

STUDY DESIGN

This was a retrospective study based on an institutional database.

METHODS

A retrospective review from an institutional approved database of more than 1,300 patients with epispadias-exstrophy complex was performed. The inclusion criteria included patients with classic bladder exstrophy with at least one failed bladder closure and a reclosure at the authors' institution with a single senior surgeon. Data collection included demographics, clinical variables, and status of urogenital diaphragm fibers. Magnetic resonance imaging (MRI) scans, if available, were reviewed with a pediatric radiologist to identify urogenital diaphragm fibers.

RESULTS

From the database, 93 patients met inclusion criteria. Of these patients, 74 had urogenital diaphragm fibers completely intact at the time of repeat closure, whereas 19 patients did not. There was no association with age or gender and status of urogenital diaphragm fibers. There was no association with osteotomy, the type of primary bladder closure, surgeon subspecialty, and the status of the urogenital fibers. Fourteen patients had at least two prior closures; surprisingly, 11 of these repeat closure patients still had intact urogenital fibers even after two prior closures.

DISCUSSION

The recent development and application of 3D MRI-guided pelvic dissection in a large group of patients led the authors to investigate whether adequate pelvic floor dissection had been accomplished at primary or secondary closure. Several patients had MRI scans performed before repeat closure in which the urogenital diaphragm fibers were identified to be intact on imaging; this was corroborated with surgical findings. Approximately 80% of patients had their urogenital diaphragm fibers completely intact and, therefore, did not have an adequate pelvic dissection during their primary or secondary bladder closure, putting the success of their previous closures at risk.

CONCLUSION

Inadequate pelvic diaphragm dissection, defined as intact urogenital diaphragm fibers, demonstrated in a large group of patients with failed exstrophy closure, may be a decisive factor in bladder closure failure. The use of 3D intra-operative image guidance may aid in a safer and more successful pelvic dissection.

Complete primary repair of bladder exstrophy is associated with detrusor underactivity type of neurogenic bladder

OBJECTIVE

To test the hypothesis that complete primary repair of bladder exstrophy (CPRE) is associated with detrussor underactivity. For this purpose, we review (1) our experience, (2) the results of the published literature as it pertains to bladder function, and (3) the known anatomic basis on which the mechanism of the observed outcome can be understood.

METHODS

The medical records of all patients who underwent CPRE by the author between 2004 and 2010 were reviewed. Attention was focused on the clinical, imaging, and urodynamic findings.

RESULTS

Four men and 2 women underwent CPRE. Follow-up ranges from 2 to 8 years. Four underwent bilateral ureteral reimplantation combined with bladder neck repair in 3. Detrusor activity (or overactivity) was not recorded in the 5 patients who underwent urodynamic studies. Four patients achieved short periods of urinary continence. The percent predicted bladder capacity, adjusted for age, ranged from 25 to 70, with a median of 60. Of the 68 publications on CPRE since 1999, none reports the presence of detrusor activity. A description of the pelvic plexus anatomy by Walsh and Donker provides a basis for the mechanism of injury resulting in the previously mentioned results: (1) complete penile disassembly eliminates the distal fixation point of the bladder-urethral plate, (2) the subsequent dissection and mobilization result in shearing injury to the microscopic pelvic plexus branches to the bladder, external sphincter, and prostatic urethra.

CONCLUSION

CPRE results in disruption of the branches of the pelvic plexus and a neurogenic bladder (detrussor underactivity).

Bony abnormalities in classic bladder exstrophy: the urologist's perspective

INTRODUCTION

As the primary practitioner managing patients with classic bladder exstrophy (CBE), it is incumbent upon the pediatric urologist to understand the associated orthopedic anomalies and their management.

METHODS

A Pubmed search was performed with the keyword exstrophy. Resulting literature pertaining to orthopedics and published references were reviewed.

RESULTS

Anatomic changes to the bony pelvis include outward rotation, acetabular retroversion with compensatory femoral anteversion, anterior pubic shortening, and pubic diastasis. Imaging options have improved, which impacts surgical planning. Surgical approach, including type of osteotomy and method of pubic approximation, is evolving. Most centers employ immobilization after surgery, with external fixation, Bryant's traction, Buck's traction, and spica casting being the most common methods. Orthopedic complications range from minor pin-site infections to neurologic and vascular compromise. Most experts agree osteotomy aids bladder closure beyond 72 h of life, but effect on continence remains controversial. Although no significant orthopedic benefit has been expounded, it may be too early to appreciate improvement in frequency or severity of osteoarthritis or hip dysplasia.

CONCLUSION

While orthopedic surgeons remain vital to managing exstrophy patients, knowledge of the anatomy, imaging, surgical approaches, and immobilization enable effective communication with parents and other physicians, improving care for these complicated patients.