| Abstract|| |
Context: Hirschsprung's disease (HD) is a congenital anomaly affecting the enteric nervous system commonly the rectosigmoid region. Treatment is surgical where the aganglionic segment is resected, and bowel continuity is restored by a coloanal anastomosis. In 1999, Georgeson et al. proposed a new technique of primary laparoscopic-assisted pull-through for HD as a new gold standard. Aim: The aim of the study was to evaluate the outcome of the laparoscopic-aided transanal pull-through procedure for the management of HD in children older than 3 years of age. Methods: This study was conducted on 15 consecutive patients presented to a university hospital, diagnosed as having HD relying on their clinical features, barium enema study and rectal biopsy. In all cases, laparoscopic-assisted transanal pull-through was attempted. The laparoscopic part included transition zone identification, seromuscular biopsy for fresh frozen histopathology and sigmoid and rectal mobilisation as much as possible down the peritoneal reflection. The transanal part included mobilisation of the rectal lower segment by 2–3 cm, resection till the ganglionic segment, and full-thickness two-layer coloanal anastomosis was done. Results: Early complications occurred in eight cases: enterocolitis in four cases and perianal excoriation occurred in four cases. There were no cases of anastomotic leak. Late complications occurred in seven patients: four cases developed stricture at the site of coloanal anastomosis and three cases experienced enterocolitis at 6 and 9 months postoperatively. Conclusion: Laparoscopic-aided transanal pull-through procedure is a safe, feasible modality for the management of HD in children more than 3 years.
Keywords: Hirschsprung's disease, Laparoscopic assisted , Minimally invasive Surgery
|How to cite this article:|
Arafa A, Mohamed W, Taher H, Ragab M, Abouelfadl MH. Laparoscopic-assisted transanal pull-through for hirschsprung's children older than 3 years: A case series. Afr J Paediatr Surg 2021;18:210-4
|How to cite this URL:|
Arafa A, Mohamed W, Taher H, Ragab M, Abouelfadl MH. Laparoscopic-assisted transanal pull-through for hirschsprung's children older than 3 years: A case series. Afr J Paediatr Surg [serial online] 2021 [cited 2021 Nov 28];18:210-4. Available from: https://www.afrjpaedsurg.org/text.asp?2021/18/4/210/322778
| Introduction|| |
Hirschsprung's disease (HD) is a congenital anomaly affecting the enteric nervous system in which there is an absence of the parasympathetic ganglion cells in the intestinal submucous and myenteric plexuses, the rectosigmoid is the most involved region., Treatment of HD is surgical where the aganglionic segment is resected, and bowel continuity is achieved by a coloanal anastomosis. Over the past years, many surgical procedures were developed by surgeons such as Swenson, Duhamel and Soave to correct this anomaly. Transanal endorectal pull-through for HD is a safe procedure for both neonates and infants. However, overstretching the anal sphincter and sigmoid colon mesentery might have the potential risk for impaired defecation function.
In 1999, Georgeson et al. proposed a new technique of primary laparoscopic-assisted pull-through for HD as a new gold standard., In 2008, they published their new study with some technical modifications. It became an operative strategy of choice for rectosigmoid HD in some centres, but marked variation in practice remains for the right-sided HD., The use of laparoscope allows taking biopsies to determine the level of aganglionosis, adequate mobilisation of the bowel with less trauma and bleeding and in addition, is cosmetically superior.,
The current study aimed to evaluate the surgical and functional outcome of the laparoscopic-aided transanal pull-through procedure for the management of HD in children older than 3 years.
| Methods|| |
This prospective study was performed at the department of paediatric surgery of a tertiary referral university-based children's hospital between June 2017 and June 2018. The follow-up period was 6 months. Prior to starting the treatment, informed consent was obtained from all the candidates' guardians, and ethical approval was obtained via the departmental research ethics and scientific committee. Diagnosis of HD was documented by history, clinical examination and investigations. A detailed history was taken, including the time of passage of first meconium, periods of constipation and history of intestinal obstruction or enterocolitis. Clinical examination included general condition, presence of associated anomalies, abdominal examination for distention and signs of obstruction and rectal examination to detect the presence of impacted stools. Investigatory workup was done including routine laboratory tests, barium enema and rectal biopsy. Inclusion criteria included age older than 3 years.
Collected clinical data included age, sex, weight and frequency of presenting symptoms. All patients underwent barium enema to determine the site of probable aganglionic segment. Then, all patients underwent pre-operative rectal irrigations for 3 months using saline solution 20 ml/kg twice daily to decompress the dilated colon, 2 days preoperative, we did bowel preparation, rectal irrigation and all patients received prophylactic pre-operative antibiotics like amoxicillin and clavulanic acid and metronidazole.
The lead surgeon stood at the right side of the patient; the cameraman was on the left side of the surgeon. Pneumoperitoneum was obtained using an open technique through the umbilicus with a pressure of 10–12 mm Hg. A 5 mm, 30° scope was introduced through a port placed below xiphisternum. One 5 mm port was placed in the right lower quadrant, and in only three cases, we needed an additional port in the left lower quadrant.
The operative procedure included two parts a laparoscopic part and a transanal part.
After ports' placement [Figure 1], in all four groups, seromuscular biopsies were taken for fresh frozen section histopathological examination by endoscopic scissors [Figure 2], the sites of the biopsies were closed by vicryl violet 3/0 [Figure 3] to decide the level of pull-through, the transitional zone was determined before any attempt was made to devascularise or mobilise the colon and by sending biopsies to the frozen section pathological examination. In Groups I and II, these biopsies were obtained about 5 cm proximal to the suspected transition zone, while in Groups III and IV, biopsies were taken in an ascending manner (rectum then rectosigmoid, sigmoid and proximally) until we reached a ganglionated part which revealed that 3 of them were short segment and 2 of them were long segment.
|Figure 2: Seromuscular biopsies were taken for fresh frozen section histopathological examination by endoscopic scissors|
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In rectosigmoid aganglionic groups (Group I and III), a window was made in the sigmoid mesentery [Figure 4] and a stitch was taken through the window into the abdominal wall to elevate it and facilitate proximal and distal mobilisation of the colon, the sigmoid was mobilised [Figure 5]. Proximal ganglionic bowel was mobilised, preserving the marginal arcade.
|Figure 5: A stitch was taken through the window into the abdominal wall to elevate it and facilitate proximal and distal mobilisation of the colon|
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In the long aganglionic segment encountered in Groups II and IV, we did the same thing with a division of lateral peritoneal reflection and freeing the splenic flexure until the colon above the funnelling (transition zone) was long enough to reach deep into the pelvis without tension in those three cases which transitional zone was at the descending colon but in another two cases where transitional zone was at transverse colon, we completed dissection of the transverse colon from the gastrocolic ligament and ligation of upper left colic vessels using energy sealing device (LigaSure) preserving marginal arcade.
In all cases, we incised sharply peritoneal reflection to facilitate mobilisation of the aganglionic rectum, the rectum below the peritoneal reflection was mobilised as much as possible within 2–3 cm of peritoneal reflection. After completion of laparoscopic dissection and assurance of hemostasis, the ports were left in situ and the patient's position was changed for transanal dissection of the remaining rectum.
As most of the rectal dissection was conducted laparoscopically, only the lower 2–3 cm of the rectum was mobilised transanally. The anastomosis was performed about 1 cm above the dentate line. The level of pull-through was at the biopsy-proven ganglionic segment. Once the anastomosis was completed, laparoscopy was performed again to check for the orientation of the pull-through bowel. A drain was placed and the port sites were closed.
Postoperatively, all patients received their immediate post-operative care in the intermediate care unit. Patients were maintained on intravenous (I. V) fluid therapy with continuous nasogastric decompression and I. V. antibiotics for 48 h. Oral feeding was initiated when bowel sounds returned. A patient was discharged when a full oral diet was reached. Parents were taught to perform rectal irrigation daily to decrease the incidence of enterocolitis and after 2 weeks from discharge, we taught parents to perform home dilatation with Hegar dilators. The patient's outcome was evaluated for faecal consistency, the frequency of soiling and presence of perianal skin excoriation at 3 and 6 months after the procedure.
Statistical data analysis was done using Microsoft® Excel® 2013 (15.0.4420.1017) 32-bit software. Descriptive data analysis as well as analytical analysis was done using ANOVA: single-factor test, t-test: two sample assuming unequal variances and F-test two sample for variances.
| Results|| |
Fifteen patients who met the criteria comprising 10 males and 5 females were recruited. The age of patients ranged from 3 years to 7 years. Group I included 7 cases (46.6%). Group II included 3 cases (20%), while Group III included 3 cases (20%) and Group IV included 2 cases (13.3). Operating time varied according to the length of the aganglionic segment, the average time for classic rectosigmoid aganglionosis (Groups I and III) was 2 h; in cases where the funnel was extending higher (Group II, IV), the average time was 3.5 h.
In 9 cases, oral intake was started 48 h after operation, and in 6 cases, it was delayed to 72 h. The mean hospital stay was 5 days (range: 4–7 days). Early complications (within 3 months postoperatively) occurred in six cases: enterocolitis in two cases that responded to conservative measures and perianal excoriation occurred in four cases that responded to zinc oxide ointment applications and constipating agents. There were no cases of anastomotic leak.
Late complications (after 3 months) occurred in seven patients: four cases developed anastomotic stricture that responded to regular dilatations and four cases had attacks of enterocolitis at 6 and 9 months postoperatively that needed hospital admission and the attacks had subsided under conservative measures in the form of parenteral antibiotics, rectal irrigation, I. V fluids and nil-per-os.
| Discussion|| |
Georgeson et al. in 2008 had experience in laparoscopic-assisted colon pull-through in 12 children converted creation the pneumoperitoneum by Veress needle to open transumbilical technique.,, In all our cases, the open technique showed safer introduction and reliability.
Some paediatric surgeons documented that the role of laparoscopy in the interventional surgery for HD is limited to those with long aganglionic segment based on contrast enema study., The reported advantages of laparoscopy for the management of HD cases were in agreement with those reported by Ksia et al., who retrospectively studied 20 patients older than 2 years who underwent a transanal Soave one-stage endorectal pull-through procedure for HD and concluded that laparoscopy may be necessary whenever there are difficulties in the pull-through. In our study, we used laparoscopy in short and long aganglionic segments.
Georgeson et al. in their multicenteric study reported a mean of 4.8 days. The incidence of enterocolitis in the Georgeson et al. multicenteric study was 7.5%, while in Wang et al.'s study, 8 of 61 (21%) patients had enterocolitis, but fortunately, all cases responded to conservative measures. Anastomotic stricture occurred in 13% which responded to regular dilatations. Perforations occurred in one case (1.6%) in Wang et al.'s study and no perforations in Georgeson et al.'s study. Leak occurred in two cases in Georgeson's study (2.5%) and two patients (3.3%) in Wang et al.'s study who were managed by diverting colostomy. No mortality was reported in the follow-up period. Continence to stools needs a longer period of follow-up, especially in the younger age group. On those children above 3 years, continence results were satisfactory in the follow-up period and reported to be good by some authors. The procedure is cost-effective and accepted by the parents.
While in this study, we have enterocolitis in five cases who responded to conservative measures, perianal excoriation occurred in four cases who responded to zinc oxide ointment applications and constipating agents, anastomotic stricture in four cases and there were no cases of anastomotic leak.
Takawira et al. compared contrast enema, anorectal manometry and biopsy with histology for the diagnosis of HD and found that haematoxylin and eosin-stained fresh frozen sections remain the criterion standard for its highest sensitivity and specificity. Intraoperative fresh frozen section histological examination allowed proper identification of the normal ganglionic level so that no remnant aganglionosis was missed; in support of such a policy, throughout the follow-up period, no patient developed recurrent constipation. Moreover, Takahashi et al. and Bonnard et al. found that laparoscopic biopsy taking can aid diagnosis and decision-making in HD cases. In this study, we depended on contrast enema, and biopsy with histology for the diagnosis of HD also, laparoscopic biopsy taking can aid diagnosis with intraoperative fresh frozen section histological examination that allowed proper identification of the normal ganglionic level and decision-making, especially in cases with ill-defined funnel with contrast enema.
In addition, Thomson et al. conducted a meta-analysis for the outcomes following totally transanal endorectal pull-through (TERPT) versus TERPT with any form of laparoscopic assistance for infants with uncomplicated HD and found no statistically significant differences concerning PO enterocolitis, faecal incontinence or constipation.
| Conclusion|| |
Laparoscopic-aided transanal pull-through procedure is a safe, feasible modality for the management of HD in children more than 3 years.
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Conflicts of interest
There are no conflicts of interest.
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Dr. Moutaz Ragab
Department of Surgery, Pediatric Surgery Unit, Faculty of Medicine, Cairo University Specialized Pediatric Hospital, Cairo University, Cairo
Source of Support: None, Conflict of Interest: None
[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5]