Annals of African Medicine

ORIGINAL ARTICLE
Year
: 2013  |  Volume : 12  |  Issue : 4  |  Page : 212--216

Exstrophy anomalies: Preliminary review of 18 cases in Maiduguri, North-eastern Nigeria


JY Chinda1, AM Abubakar1, TM Dabkana2, D Kwari3, Y Mava4, KJ Bwala1, S Wabada1,  
1 Department of Surgery, Paediatric Surgical Unit, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria
2 Department of Orthopaedic and Traumatology, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria
3 Department of Anaesthesia, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria
4 Department of Paediatrics, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria

Correspondence Address:
J Y Chinda
Deeper Life Bible Church, PMB 516, Maiduguri, Borno State
Nigeria

Abstract

Background: Exstrophy anomalies, although rare, pose a tremendous challenge to both surgeons and surrogates. Management is intricate and experience with large members is restricted to a few centres worldwide. This report is a review of 18 cases of these anomalies managed in University of Maiduguri Teaching Hospital (UMTH) over 8 years, highlighting the intricacies of management, and contributes to the existing data bank on this subject matter in our environment. Materials and Methods: We reviewed the records of all cases of anomalies that were managed in the index hospital from December 2002 to December 2010. Results: Eighteen cases were studied. The youngest was a 2-day-old neonate and the oldest was 6 years at repair, with a median age of 4 months. There were 7 boys and 9 girls with bladder exstrophy, and the remaining two were girls with cloacal exstrophy, giving a male-female ratio of 7:11 for the exstrophy anomalies. Eight patients (33.5%) had associated congenital anomalies; 16.7% had undescended testes (UDT), anorectal malformation (ARM) and patent processus vaginalis (PPV); and duplicate bladder occurred in 5.6% of the patients. All but one patient had bilateral posterior iliac osteotomy at bladder closure. Out of the 17 patients that had osteotomy, 76.5% had satisfactory bladder closure (no complication), 5.9% had superficial wound dehiscence, 11.8% had bladder neck dehiscence and 5.9% had complete disruption. The lone patient that did not undergo osteotomy had complete bladder dehiscence. Postoperative immobilization was done for 3 weeks for 16 cases; one was discontinued after 1 week because of complication. The longest follow-up was for 2 years and the shortest for 2 weeks. Four patients (22.2%) did not turn up for follow-up. Conclusion: Exstrophy anomalies although rare remain a major challenge in paediatric surgery. Iliac osteotomy, among other technical considerations, remains a cornerstone for successful bladder closure.



How to cite this article:
Chinda J Y, Abubakar A M, Dabkana T M, Kwari D, Mava Y, Bwala K J, Wabada S. Exstrophy anomalies: Preliminary review of 18 cases in Maiduguri, North-eastern Nigeria.Ann Afr Med 2013;12:212-216


How to cite this URL:
Chinda J Y, Abubakar A M, Dabkana T M, Kwari D, Mava Y, Bwala K J, Wabada S. Exstrophy anomalies: Preliminary review of 18 cases in Maiduguri, North-eastern Nigeria. Ann Afr Med [serial online] 2013 [cited 2020 Sep 26 ];12:212-216
Available from: http://www.annalsafrmed.org/text.asp?2013/12/4/212/122688


Full Text

 Introduction



Exstrosphy anomalies are rare but potentially devastating and technically challenging. Bladder exstrophy, although the commonest sub-group of the epispadias-exstrophy complex, has considerable variability. [1] It is said to occur in one in every 40,000-50,000 live births with a male-female ratio of 2:1. [2]

Management of these anomalies requires intricate multi-stage reconstructive procedures, and considerable effort and patience on the part of the surrogates.

In our country, Nigeria, there is a paucity of literature on this intriguing anomaly. Hence it is imperative to review our experience from January 2002 to December 2010 to add to the existing literature.

 Materials and Methods



This is a retrospective review of exstrophy anomalies managed in University of Maiduguri Teaching Hospital (UMTH) among children 15 years and younger.

Data extracted from patient case notes, operation, and admission and discharge registers included name, sex, age, hospital number, associated anomalies, type of operation performed, and outcome of bladder closure and duration of follow-up. These were collected and analysed. Six cases whose case files could not be found were excluded from the study. We observed that the following steps were very critical and crucial to the success of exstrophy surgeries:

Extra-peritoneal dissection of the bladder plate while taking care to protect the uretersExcision of the rim of skin from the plate to prevent the emergence of carcinoma laterPlacement of a suprapubic catheter, and bilateral ureteric and urethral stentsTwo-layered tubularization of the bladder plateBilateral posterior iliac osteotomy and approximation of the pubic symphysis with nylon IImmobilization by gallow traction.

 Results



There were 16 cases of bladder exstrophy and two cases of cloacal exstrophy that were managed over an 8-year period. Seven of the bladder exstrophy were boys and nine were girls. Both cases of cloacal exstrophy were girls.

The youngest and the oldest patient at the time of repair were a 2-day-old neonate and a 6-year-old child, respectively, with a median of 4 months [Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6].{Figure 1}{Figure 2}{Figure 3}{Figure 4}{Figure 5}{Figure 6}

There were seven boys with bladder exstrophy, whereas nine girls had bladder exstrophy and two others with cloacal exstrophy, giving a male-female ratio of 7:11 for exstrophy anomalies [Table 1]. Eight patients (33.5%) had associated congenital anomalies, which included undescended testes (UDT) in three patients (16.7%), and anorectal malformation (ARM), patent processus vaginalis (PPV) and duplicate bladder in one patient each (5.6%), as shown in [Table 2].{Table 1}{Table 2}

All cases except one had bilateral posterior iliac osteotomy at bladder closure, which was done at the time of varied presentation.

Out of the 17 patients who had exstrophy anomaly and osteotomy, 13 (76.5%) had satisfactory bladder closure (no complication), 1 (5.9%) had superficial wound dehiscence, 2 (11.8%) had bladder neck dehiscence and 1 (5.9%) had complete dehiscence. But the only patient who did not have bilateral iliac osteotomy had complete bladder dehiscence [Table 3]. Postoperatively 16 patients were fully immobilized on improvised gallow traction [Figure 3] for a period of 3 weeks; the remaining one developed wounds on the sites of traction application, which was discontinued after one week of application. There was no mortality recorded in the study. The longest follow-up was for a period of 2 years and the shortest was for 2 weeks; four patients (22.2%) did not turn up for follow-up.{Table 3}

 Discussion



Bladder exstrophy although rare poses social and psychological embracement to parents and management challenges to both parents and surgeons. In most reports [1],[2],[3],[6] it has a slight male preponderance, but in this study we observed a slight female predominance as shown in [Table 1].

Prenatal diagnosis is possible with well-established facilities and diligence. Failure to localize the fluid-filled bladder on multiple examinations is usually highly suggestive.

All our patients were diagnosed postnatally through spot diagnosis for a dearth of the aforementioned factors.

In such anomalies, other associated anomalies such as the components of the VACTERL association are possible, but in this series, the following congenital anomalies were observed: UDT was most frequent, in 16.7% of the patients, whereas PPV, ARM and duplicate bladder occurred in 5.6% of the patients as shown in [Table 2]. This reinforces the truism to always search for other associated congenital anomalies while detecting one. In contrast to the predominance of the associated UDT in this series and others, [13] retractile testes were found to be more common in Shittu et al.'s. [3] These anomalies were corrected at the time of bladder closure.

At diagnosis we try to assess bladder capacity by observing the degree of bladder plate protrusion and by depressing the bladder mucosa inward using the index finger. When bladder capacity is considered adequate, the decision is taken to close the bladder.

Sometimes bladder capacity is very low at birth, so the surgery is delayed to allow bladder plate growth and the patient is discharged home on antibiotics with the instruction to keep the bladder moist with saline-soaked gauze.

The goals of surgical treatment are to obtain a continent child with a normal upper urinary tract and abdominogenital reconstruction, which makes possible a normal sexual and social life. [3]

Early surgery is imperative to prevent and mitigate epithelial metaplasia and inflammatory changes, which can compromise bladder capacity.

Due to improvements in surgical techniques, reconstruction of all forms of exstrophy has now become possible. The best functional results have been obtained with the Modern Staged Surgical Reconstruction (MSSRE) developed at Johns Hopkins. [4],[5]

Previously, reconstruction for bladder exstrophy was usually associated with a high failure rate, [7] especially in our environment, because of daunting constraints, late presentation, lack of availability of bladder neck, other incontinence procedures, etc., As a result, in the past, treatment of most of these cases was limited to urinary diversions, [8],[9],[10] which were fraught with complications such as hyper-chloremic metabolic acidosis, recurrent nephritis and anastomotic stenosis. [3],[11],[12]

Success has been reported [3],[13] with bladder closure without osteotomy, with nylon danning of the overlying fascia. But we found that the combination of nylon danning and symphysial approximation gives a better outcome. There were two cases that had complete bladder dehiscence in this series: One that did not undergo osteotomy and another that had traction immobilization discontinued after 1 week because of development of complications at the site of traction application [Table 3]. These underscores the importance of achieving and maintaining symphysial approximation through either anterior or posterior iliac osteotomy, and the use of traction or body cast for maintenance. We employed the posterior approach because of our familiarity with the technique, although the anterior approach proved to be the gold standard.

Follow-up of these patients is rather too short for meaningful detection of evolving complications. Patients with exstrophy anomalies should be followed up for life so that emergent long-term challenges of bladder exstrophy management vis-à-vis urinary incontinence, back pressure changes, metabolic complications and even epithelial dysplastic changes can be detected early and managed accordingly.

Incontinence of urine remains a major challenge among children with exstrophy anomalies, even after bladder closure. Mainz pouch operation [14] in experienced hands offers great relief in this direction. It is the procedure of choice in late-presenting cases with compromised bladder capacity, failed first-stage bladder closure and failed bladder neck reconstruction repair.

 Conclusion



Exstrophy anomalies, although rare, remain a major challenge in paediatric surgical practice. Iliac osteotomy, among other technical considerations, remains a cornerstone for successful bladder closure.

 Acknowledgments



The authors are gratefu to Dr. A Katagum for his valuable contributions in computer work and our family members for their unflinching moral and psychological supports.

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