Hirschsprung's disease in adolescents and adults

Association between gut microbiota and Hirschsprung disease: a bidirectional two-sample Mendelian randomization study

Background

Several studies have pointed to the critical role of gut microbiota (GM) and their metabolites in Hirschsprung disease (HSCR) pathogenesis. However, the detailed causal relationship between GM and HSCR remains unknown.

Methods

In this study, we used two-sample Mendelian randomization (MR) analysis to investigate the causal relationship between GM and HSCR, based on the MiBioGen Consortium's genome-wide association study (GWAS) and the GWAS Catalog's HSCR data. Reverse MR analysis was performed subsequently, and the sensitivity analysis, Cochran's Q-test, MR pleiotropy residual sum, outlier (MR-PRESSO), and the MR-Egger intercept were used to analyze heterogeneity or horizontal pleiotropy. 16S rDNA sequencing and targeted mass spectrometry were developed for initial validation.

Results

In the forward MR analysis, inverse-variance weighted (IVW) estimates suggested that Eggerthella (OR: 2.66, 95%CI: 1.23-5.74, p = 0.01) was a risk factor for HSCR, while Peptococcus (OR: 0.37, 95%CI: 0.18-0.73, p = 0.004), Ruminococcus2 (OR: 0.32, 95%CI: 0.11-0.91, p = 0.03), Clostridiaceae1 (OR: 0.22, 95%CI: 0.06-0.78, p = 0.02), Mollicutes RF9 (OR: 0.27, 95%CI: 0.09-0.8, p = 0.02), Ruminococcaceae (OR: 0.16, 95%CI: 0.04-0.66, p = 0.01), and Paraprevotella (OR: 0.45, 95%CI: 0.21-0.98, p = 0.04) were protective factors for HSCR, which had no heterogeneity or horizontal pleiotropy. However, reverse MR analysis showed that HSCR (OR: 1.02, 95%CI: 1-1.03, p = 0.049) is the risk factor for Eggerthella. Furthermore, some of the above microbiota and short-chain fatty acids (SCFAs) were altered in HSCR, showing a correlation.

Conclusion

Our analysis established the relationship between specific GM and HSCR, identifying specific bacteria as protective or risk factors. Significant microbiota and SCFAs were altered in HSCR, underlining the importance of further study and providing new insights into the pathogenesis and treatment.

Approach to the Adult Colorectal Patient with a History of Pediatric Abdominal Surgery

Children with colorectal diseases often undergo operative management in their youth. As these patients become adult, it is important for surgeons to understand their postoperative anatomy as well as the pathophysiology of their diseases. Here, we present a description of common colorectal diseases of childhood that may have significant impact on patients' presentations as adult. We also discuss the diagnosis and management of conditions that are usually seen early in life but may present during adulthood as well.

OUR EXPERIENCE IN TREATMENT OF HIRSCHSPRUNG'S DISEASE IN A 18-YEAR-OLD PATIENT. CLINICAL CASE

Introduction: Hirschsprung's disease (HD) is a relatively rare condition, in which the intermuscular (Auerbach) and submucosal (Meissner) plexus are absent in the colon wall at various lengths. In the literature, HD is described mainly in relation to the pediatric surgery area of interests because up to 90% of cases of this disease are detected before the age of 5 years 6. However, in some patients, the symptoms of the disease are not severe, so patients survive to adulthood without an established diagnosis.Clinical case: we demonstrate our experience of surgical treatment of Hirschsprung's disease in a 18-year-old patient.Conclusion: Although Hirschsprung's disease is in most cases a disease of childhood, it is necessary to keep in mind its typical symptoms when an adult patient complains of constipation. Proper diagnosis and correctly selected surgical treatment can not only eliminate symptoms and improve quality of life, but also reduce the likelihood of serious complications.

Transanal-only Swenson-like pull-through for late diagnosed Hirschsprung disease

Hirschsprung disease (HD) is an obstructive colonic process usually diagnosed in the neonatal period. A small subset of cases are diagnosed late, present with severe constipation without enterocolitis and have low rectosigmoid disease. A transanal-only pull-through is a well-described approach but in the newborn period risks a situation whereby the transition zone is higher than the sigmoid. We present our experience with the unique patient population of older HD patients in whom the transition zone was reliably reachable via a single-stage transanal approach, performed in prone position. Patients between 2 and 6 years of age with a rectal or sigmoid transition zone and minimal proximal colonic dilation can undergo a primary transanal pull-through surgical approach.

Current practice patterns of rectal suction biopsy in the diagnostic work-up of Hirschsprung's disease: results from an international survey

PURPOSE

The diagnosis of Hirschsprung's disease (HD) was revolutionized by the introduction of rectal suction biopsy (RSB), allowing specimens to be taken without general anesthesia on the ward or as an out-patient procedure. However, insufficient tissue samples are not uncommon, and subsequently histopathologists often remain reluctant to confirm the presence or absence of enteric ganglion cells merely on the basis of submucosal RSBs. The aim of this study was to evaluate the current usage of RSB in the diagnostic work-up of HD based on an international survey.

METHODS

A 15-item questionnaire was distributed among participants and faculty members at the 21st International Meeting of the Pediatric Colorectal Society.

RESULTS

Eighty-seven pediatric surgeons from 30 countries completed the anonymous survey (response rate 70.2 %), grouped into 68 (78.2 %) staff surgeons and 19 (21.8 %) trainees, with a median work experience of 18 years (range 2-45 years). Of these, 74 (85.1 %) use RSB in the diagnostic work-up of patients with suspected HD, whereas 13 (14.9 %) prefer open full-thickness biopsy under general anesthesia. In total, 47 (63.5 %) respondents perform ≥20 RSBs (range 3-100 RSBs) per year. Five different RSB instruments were reported, the most common ones being rbi2 (65.0 %), Solo-RBT (15.0 %) and multipurpose suction biopsy kit (8.3 %). Only 22 (29.7 %) of the respondents use a defined negative suction pressure, with a median of 10 mL air (range 6-25 mL air). The most proximal reported biopsy site was located at a median of 2 cm (range 1-15 cm) above the pectinate line and a median of 2 (range 1-5) specimens are routinely taken, mainly from the posterior rectal wall. Insufficient tissue samples with need for repeat RSB were encountered in a median of 10 % (range 0-40 %). Most frequently used staining methods for rectal biopsies are hematoxylin/eosin (75.9 %), acetylcholinesterase (73.6 %), and calretinin (33.3 %). Overall, 36 (48.6 %) respondents had experienced RSB-related complications, including self-limiting rectal blood loss (n = 28), persistent rectal bleeding requiring blood transfusion (n = 9) and rectal perforation requiring surgical intervention (n = 7).

CONCLUSIONS

Although RSB is considered to be today's gold standard for the diagnosis of HD, many aspects of its current usage are lacking consensus. Therefore, a prospective multi-center study or larger global audit appears warranted to identify if the present survey reflects common surgical practice and to establish universal standards for RSB.

Rectal suction biopsy for the diagnosis of Hirschsprung's disease: a systematic review of diagnostic accuracy and complications

PURPOSE

Rectal suction biopsy (RSB) combined with acetylcholinesterase (AChE) staining is currently the gold standard for the diagnosis of Hirschsprung's disease (HD). However, some pathologists are still reluctant to diagnose HD in RSBs as it requires thick submucosal tissue to confirm the absence of ganglion cells. Furthermore, insufficient specimens and adverse events have been reported. The objective of this study was to determine the diagnostic accuracy and incidence of complications of RSBs in patients suspected of HD based on a systematic review of the published literature.

METHODS

A literature-based search for relevant publications was conducted using multiple online databases. Staining for AChE/hematoxylin and eosin should have been used to evaluate RSBs. The number of true-positive, false-positive, true-negative and false-negative results was recorded and data on RSB-related complications was extracted. Pooled incidence rates and odds ratios (ORs) with 95% confidence intervals (CI) were calculated using standardized statistical methodology.

RESULTS

Fifty-eight studies met defined inclusion criteria, reporting a total of 14,053 RSBs. The median cohort size consisted of 72 patients (range 1-766) with a median age of 14.4 months (range 1 day-66 years) at time of biopsy. In 89.93% (CI 89.11-90.70%), RSB provided adequate tissue for the diagnosis of HD. Insufficient specimens were obtained in 10.07% (CI 9.30-10.89%) and in 8.46 % (CI 7.55-9.46%) RSB was repeated. The incidence of HD was 19.13% (CI 18.25-20.03%). Mean sensitivity of RSB was 96.84% (CI 95.57-97.47%) and mean specificity was 99.42% (CI 99.17-99.57%). The overall complication rate was 0.65% (CI 0.46-0.91%) with persistent rectal bleeding requiring blood transfusion in 0.53% (CI 0.36-0.77%), bowel perforation in 0.06% (CI 0.02-0.18%) and pelvic sepsis in 0.06% (CI 0.02-0.18%). Complications were significantly more frequent in newborns and infants compared to older children (OR 9.00 [CI 4.75-17.07], p < 0.0001).

CONCLUSIONS

RSB combined with AChE staining is a simple, safe and accurate method for the diagnosis of HD. The risk for RSB-related complications is higher in newborns and infants.

Chronic severe constipation: current pathophysiological aspects, new diagnostic approaches, and therapeutic options

Chronic constipation is a considerable problem because it significantly affects the quality of a patient's life. Constipation can be diagnosed at every age and is more frequent in women and among the elderly. In epidemiological studies, its incidence is estimated at 2-27% in the general population. Chronic constipation may be primary or secondary. However, primary constipation (functional or idiopathic) can be classified into normal transit constipation, slow transit constipation, and pelvic outlet obstruction. In this review we make an attempt to present the current pathophysiological aspects and new therapeutic options for chronic idiopathic constipation, particularly highlighting the value of patient assessment for accurate diagnosis of the cause of the problem, thus helping in the choice of appropriate treatment.

A 15-Year Experience with the One-Stage Surgery for Treatment of Hirschsprung's Disease in Newborns, Infants, and Young Children

The treatment of Hirschsprung's disease has changed over the past several years. Significant modifications occurred after the implementation of surgery without laparotomy, using transanal access. The type of this surgery depends on the condition and the age of a child. The aim of the study was to summarize our 15-year experience with one-stage surgery for the treatment of Hirschsprung's disease in the wider context of current clinical practice and to identify transanal endorectal pull-through-related factors influencing the surgery and hospitalization. The retrospective analysis of newborns, infants, and young children was performed between 2000 and 2014. Four girls and 29 boys were operated on. The parameters describing the surgery and the hospitalization were analyzed. The number of patients treated using transanal endorectal pull-through technique was 30, and Duhamel-Martin, 3. There were significant correlations (p < 0.05) between necessity of blood transfusion, length of resected intestine, operative time, the number of intraoperative histopathological assessments, and length of hospitalization. The time of one-step surgery is extended because of waiting for repeated intraoperative histopathological assessment of the level of resection. More extended bowel resection is connected with longer length of hospitalization and, more often, necessity of blood transfusion.

Long-term outcomes and quality of life after subtotal colectomy combined with modified Duhamel procedure for adult Hirschsprung's disease

BACKGROUND

Subtotal colectomy combined with modified Duhamel procedure (Jinling procedure) was used in patients with adult Hirschsprung's disease (AHD) at Jinling Hospital in the last decade. The aim of this study is to evaluate the safety, effectiveness and quality of life of Jinling procedure for AHD.

MATERIALS AND METHODS

All the data are from the database of the Jinling Hospital Constipation Registry System. Primary outcomes, including safety (morbidity and adverse events), effectiveness (satisfaction rate, Wexner constipation scale (WCS) and bowel function score (BFS)) and gastrointestinal quality of life index (GIQLI), were all evaluated.

RESULTS

Fifty-nine patients were available for this study and the mean postoperative period was 44 months. Seventeen major complications were found in 11 patients and most of the complications could be managed conservatively. A significant improvement in WCS, BFS and GIQLI at 6 months postoperatively was obtained.

CONCLUSION

Jinling procedure is safe and effective for AHD.

Late diagnosis of Hirschsprung disease--patient characteristics and results

PURPOSE

The aim of the present study was to describe the characteristics and the postoperative results of children diagnosed as having Hirschsprung disease (HD) after the age of 3 years.

METHODS

All patients with HD diagnosed after the age of 3 years in our hospital from 1998 to 2011 were included. Patient characteristics and postoperative results were prospectively registered.

RESULTS

Eleven children were included. Age at diagnosis was 3.0 to 9.6 years. Ten patients had rectosigmoid disease, whereas 1 had total colonic aganglionosis. Three children were given a diverting ileostomy before the pull-through procedure, and all 3 had ileostomy-related complications. Early postoperative complications were seen in 5 children, of whom 2 had anastomotic leakage. At final follow-up, with a median of 3 years postoperatively, 7 had normal bowel function, 1 had frequent loose stools, and 3 were soiling.

CONCLUSIONS

Early postoperative complications, especially anastomotic leakage, occurred frequently in children with late-diagnosed HD. Therefore, a diverting stoma should be considered in these patients. The long-term functional results were comparable with those seen in children operated on as neonates.

Laparoscopic rectosigmoid resection with transanal colonic pull-through and delayed coloanal anastomosis: a new approach to adult Hirschsprung disease

BACKGROUND

Hirschsprung disease in adults is a rare and frequently misdiagnosed cause of long-standing, refractory constipation. Surgical procedures initially developed for pediatric patients have been applied to adults with varying degrees of success.

OBJECTIVE

Our aim was to describe a new surgical procedure consisting of laparoscopic rectosigmoid resection with a transanal colonic pull-through followed by a delayed coloanal anastomosis for the treatment of Hirschsprung disease in adults and to present our preliminary results with this technique.

DESIGN AND SETTING

This was a descriptive observational study of treatment outcome conducted at the colorectal surgical unit of a university teaching hospital in France.

PATIENTS

Patients were adults with confirmed Hirschsprung disease treated from October 2006 through February 2009.

INTERVENTION

Laparoscopic rectosigmoid resection was performed with a transanal colonic pull-through followed by a delayed coloanal anastomosis.

MAIN OUTCOME MEASURES

Clinical and functional data (Cleveland Clinic Florida incontinence scale and Fecal Incontinence Quality of Life scale) were obtained at postoperative visits.

RESULTS

Five patients underwent the procedure. One patient died of postoperative cardiovascular complications. No patient had to be reoperated. No anastomotic leakage occurred. One patient developed anastomotic stricture requiring dilatation. No sexual or urinary dysfunction was reported. Postoperative analysis (mean follow-up 16 months) showed good functional outcomes in 3 (75%) of the 4 evaluable patients.

LIMITATIONS

This study had only a small number of patients and no controls other comparison with cases reported in the literature.

CONCLUSION

Laparoscopic rectosigmoid resection with a transanal colonic pull-through followed by delayed coloanal anastomosis represents a valid alternative in the treatment of Hirschsprung disease in adult patients, because it involves minimally invasive surgery, does not require a preventive diverting stoma, and shows anastomotic security.

Hirschsprung disease and hypoganglionosis in adults: radiologic findings and differentiation

PURPOSE

To retrospectively evaluate the imaging features of adult Hirschsprung disease (HD) and adult hypoganglionosis (HG) and to compare these features with histopathologic findings.

MATERIALS AND METHODS

This study was institutional review board approved, and the requirement for informed consent was waived. The imaging, medical, and histopathologic data of 10 patients (seven women, three men; mean age, 38 years) with histopathologically proved adult HD and/or adult HG were reviewed. Two radiologists reviewed 10 transverse computed tomographic (CT) scans and five double-contrast barium enema radiographs in consensus for the presence or absence and the location of the transition zone. The transverse diameter ratio of the most dilated colonic segment proximal to the transition zone to the narrowed colonic segment distal to the transition zone (ie, transition zone ratio), and the longitudinal length of the transition zone were also determined. The CT findings of HD and HG were compared by using the Mann-Whitney U test.

RESULTS

All patients with lifelong or chronic constipation had a transition zone in the upper part of the rectum or rectosigmoid junction (n = 5) or in the descending colon (n = 5) on the CT scans and the double-contrast barium enema radiographs. The transition zone ratio was significantly different between the patients with HD (median ratio, 4.0) and the patients with HG (median ratio, 2.0) (P = .016). However, there was no significant difference in the longitudinal length of the transition zone between the two patient groups (median ratios, 4.4 cm for HD group and 6.0 cm for HG group; P = .190).

CONCLUSION

A markedly dilated proximal colonic segment with a transition zone and a narrowed distal colonic segment on CT and double-contrast barium enema images in conjunction with chronic refractory constipation in an adult should suggest the diagnosis of adult HD or adult HG. The detection of a much higher transition zone ratio may help to establish the diagnosis of HD.

Gastrointestinal motility disorders in adolescent patients: transitioning to adult care

A wide spectrum of gastrointestinal motility disorders present in childhood. Some are unique to children, especially congenital disorders including certain pseudo-obstruction disorders or those associated with anatomic developmental defects, whereas others are common adult disorders, such as achalasia, that rarely manifest in children. This article reviews the pediatric presentations and sequelae of childhood gastrointestinal motility disorders and then discusses long-term management issues for these children as they progress into adulthood. The goal is to optimize medical care and ensure the adequate nutritional status essential for neurocognitive and psychosocial development of the child. Multidisciplinary care from specialists, including gastroenterologists, psychologists, and pain specialists, is often required to optimize the lives of these patients.

Adolescents and young adults with Hirschsprung's disease

A majority of children and adolescents who have successful surgery to resect colon affected by Hirschsprung's disease suffer from digestive disorders, defecation problems, or both into adult life. In those with persistent symptoms following Hirschsprung's surgery, colon manometry facilitates a physiologic explanation for symptoms and guides treatment. Only a few patients born with Hirschsprung's disease make it to adult age before diagnosis and surgery, but their management does not differ from that of children with Hirschsprung's disease. The quality of life for patients with Hirschsprung's disease depends on psychosocial factors and not on childhood suffering or chronic symptoms.

Constipation of anorectal outlet obstruction: pathophysiology, evaluation and management

Constipation is a subjective symptom of various pathological conditions. Incidence of constipation fluctuates from 2 to 30% in the general population. Approximately 50% of constipated patients referred to tertiary care centers have obstructed defecation constipation. Constipation of obstructed defecation may be due to mechanical causes or functional disorders of the anorectal region. Mechanical causes are related to morphological abnormalities of the anorectum (megarectum, rectal prolapse, rectocele, enterocele, neoplasms, stenosis). Functional disorders are associated with neurological disorders and dysfunction of the pelvic floor muscles or anorectal muscles (anismus, descending perineum syndrome, Hirschsprung's disease). However, this type of constipation should be differentiated by colonic slow transit constipation which, if coexists, should be managed to a second time. Assessment of patients with severe constipation includes a good history, physical examination and specialized investigations (colonic transit time, anorectal manometry, rectal balloon expulsion test, defecography, electromyography), which contribute to the diagnosis and the differential diagnosis of the cause of the obstructed defecation. Thereby, constipated patients can be given appropriate treatment for their problem, which may be conservative (bulk agents, high-fiber diet or laxatives), biofeedback training or surgery.

Hirschsprung's Disease in Adults: Report of a Case and Review of the Literature

Hirschsprung's disease in the adult is a rare and frequently misdiagnosed cause of long-standing refractory constipation. We report a case of Hirschsprung's disease in a 23-year-old man and review the literature. The patient had a history of chronic constipation that required daily enemas, since early infancy, but he had remained in good health until intestinal obstruction developed. As a subemergency operation, right transverse colostomy was performed, to relieve the constipation. Histological examination, by a biopsy, showed absence of ganglion cells in the myenteric plexus in the rectum. One year later, Ikeda's modification of the Duhamel procedure was successfully performed as definitive surgery. The postoperative course was uneventful, and complete resolution of the symptoms without complications has been confirmed by a 22-year follow-up. A review of 229 cases of adult Hirschsprung's disease in the literature suggested that the Duhamel procedure is the operation of choice because of the lower postoperative morbidity rate and better functional outcome.

Stapled anopexy for short segment Hirschprungs disease in adults

Traditional treatment of short segment Hirschprungs disease in adult consists of major resectional procedures, often with the use of a temporary stoma. Patients with this disease may have significant morbidities that increase their risk of post-operative morbidity and mortality. In an attempt to minimize the procedural related morbidity, we describe the application of the stapled anopexy technique to treat short segment Hirschprungs disease.

Enteric nerves and interstitial cells of Cajal are altered in patients with slow-transit constipation and megacolon

BACKGROUND & AIMS

A variety of gastrointestinal motility disorders have been attributed to alterations of interstitial cells of Cajal and malformations of the enteric nervous system. This study evaluates both the distribution of interstitial cells of Cajal and the pathohistology of the enteric nervous system in 2 severe human colorectal motility disorders.

METHODS

Colonic specimens obtained from patients with slow-transit constipation (n = 11), patients with megacolon (n = 6), and a control group (n = 13, nonobstructing neoplasia) were stained with antibodies against c-kit (marker for interstitial cells of Cajal) and protein gene product 9.5 (neuronal marker). The morphometric analysis of interstitial cells of Cajal included the separate registration of the number and process length within the different regions of the muscularis propria. The structural architecture of the enteric nervous system was assessed on microdissected whole-mount preparations.

RESULTS

In patients with slow-transit constipation, the number of interstitial cells of Cajal was significantly decreased in all layers except the outer longitudinal muscle layer. The myenteric plexus showed a reduced ganglionic density and size (moderate hypoganglionosis) compared with the control group. Patients with megacolon were characterized by a substantial decrease in both the number and the process length of interstitial cells of Cajal. The myenteric plexus exhibited either complete aganglionosis or severe hypoganglionosis.

CONCLUSIONS

The enteric nervous system and interstitial cells of Cajal are altered concomitantly in slow-transit constipation and megacolon and may play a crucial role in the pathophysiology of colorectal motility disorders.

Organization of the enteric nervous system in the human colon demonstrated by wholemount immunohistochemistry with special reference to the submucous plexus

To demonstrate the normal topography and structure of the enteric nervous system (ENS) in the human colon, the colonic wall of patients (n = 10, mean age 66.3 years), who underwent abdominal surgery unrelated to intestinal motility disorders, was submitted to wholemount immunohistochemistry. The specimens were stretched out and separated into the tunica muscularis, the outer and inner portion of the tela submucosa and the tunica mucosa. Prior to the application of the neuronal marker Protein Gene Product (PGP) 9.5, the laminar preparations were pretreated with the maceration agent KOH. The plexus myentericus was composed of prominent ganglia and interconnecting nerve fiber strands (NFS) forming a polygonal network, which was denser in the descending than in the ascending colon. Nerve cells were observed within the ganglia as well as in primary, secondary and tertiary NFS. The latter ramified into the adjacent smooth muscle layers, which contained the aganglionated plexus muscularis longitudinalis and circularis. The submucous plexus comprised three nerve networks of different topography and architecture: the delicate plexus submucosus extremus consisted of parallel orientated NFS with isolated nerve cells and small ganglia and was located at the outermost border of the tela submucosa adjacent to the circular muscle layer. The plexus submucosus externus was closely associated with the plexus submucosus extremus and composed of larger ganglia and thicker NFS. The plexus submucosus internus was situated adjacent to the lamina muscularis mucosae and formed a network with denser meshes but smaller ganglia and NFS than the plexus submucosus externus. The NFS of the aganglionated plexus muscularis mucosae followed the course of the smooth muscle cells of the lamina muscularis mucosae. The honeycomb-like network of the plexus mucosus was located within the lamina propria mucosae and divided into a subglandular and a periglandular portion. Single and accumulated nerve cells were observed within the plexus mucosus as a regular feature. The findings confirm the complex structural organisation of the ENS encountered in larger mammals, in particular the subdivision of the submucous plexus into three different compartments. PGP 9.5-immunohistochemistry applied to wholemount preparations comprehensively visualized the architecture of the intramural nerve plexus in human colonic specimens. In addition to conventional cross-sections, this technique allows a subtle assessment and classification of structural alterations of the ENS in patients with colorectal motor disorders.

Hirschsprung's disease in an adult patient with familial occurrence: report of a case

Hirschsprung's disease is almost always associated with newborns or infants; however, we report herein the unusual case of a 46-year-old woman in whom the symptoms of Hirschsprung's disease emerged late in adult life. The involved rectosigmoid region was successfully removed by performing Duhamel's operation with a diverting colostomy. After the colostomy was closed, she regained normal defecatory function. She had one male child affected by Hirschsprung's disease of the total colon type who was operated on as a 12-month-old baby. The genetic predisposition of Hirschsprung's disease has been reported, but its mode of inheritance has not yet been clarified. Moreover, most papers on the familial occurrence of this disease have reported that siblings were affected. Our patient was unique for the definite occurrence of the disease in successive generations. The features of Hirschsprung's disease in adults and the familial occurrence are discussed with a review of the literature.

Zonal adult Hirschsprung's disease

BACKGROUND

Hirschsprung's disease is a congenital disorder which is rare in adulthood. In typical cases the aganglionosis involves mainly the rectum or rectosigmoid colon and the lesion starts from the anal valve. Zonal segmental aganglionosis is a very rare type even in children.

PATIENT

A 54 year old women with zonal segmental aganglionosis had an aganglionic segment 18 cm in length located in the rectosigmoid colon with an 8 cm long normal appearing rectum and dilated proximal colon. Resection of the stenotic segment with end to end anastomosis was performed.

CONCLUSION

The functional result was excellent five years after the operation.

Immunohistochemical evaluations of ultrashort-segment Hirschsprung's disease. Report of three cases

PURPOSE

Unlike classic Hirschsprung's disease, short-segment and ultrashort-segment varieties are usually found to be latent and milder. Ultrashort-segment Hirschsprung's disease may present as intractable chronic constipation in children over one year of age, adolescents, and adults. Anorectal myectomy has been shown in many instances to provide effective long-term treatment for certain patients with ultrashort-segment Hirschsprung's disease. Histologically, the affected segment in Hirschsprung's disease has been shown to have increased cholinergic nerves, lack of nitric oxide synthase-containing neuronal elements, and show moderate to severe loss of myenteric neurons.

METHODS

Here, we report three cases that showed clinical and manometric evidence of ultrashort-segment Hirschsprung's disease. Two of the three patients responded well to myectomy.

RESULTS

Detailed histologic and immunohistochemical evaluation of the internal anal sphincter and a comparison with three normal controls revealed absence of nitric oxide synthase-containing neurons in both cases that responded well to surgery and continued presence of these neurons in the patient who did not respond. A review of the current literature on various treatment modalities is included.

CONCLUSIONS

Anorectal myectomy provides long-term relief of this chronic problem in a subgroup of patients with ultrashort-segment Hirschsprung's disease who lack nitrinergic neurons at the internal anal sphincter.

Surgery for constipation: a review

PURPOSE

Constipation is related to intestinal motility disorders (colonic inertia (CI)), pelvic floor disturbances (pelvic outlet obstruction), or a combination of both problems. This review summarizes the physiologic and pathophysiologic changes in patients with intractable constipation and gives an overview of surgical treatment options.

RESULTS

Although subtotal colectomy with ileorectal anastomosis is the best surgery for CI, there are still approximately 10 percent of patients who will complain of pain and constipation. A completion proctectomy and an ileoanal pouch procedure may be a viable option in a highly select group of patients. In patients with megabowel, reported results are mixed. Subtotal colectomy, partial colectomy for megacolon, and the Duhamel procedure for megarectum have all been reported with variable results. In patients with an isolated distended sigmoid colon, sigmoid colectomy has achieved good results. Anorectal myectomy has not been proven to be successful in the long term. However, in patients with adult short segment Hirschsprung's disease, myectomy can be successful. Patients with pelvic outlet obstruction can be successfully treated with biofeedback. In a small group of patients with a rectocele or a third degree sigmoidocele, surgical intervention yields a high success rate. Division or resection of the puborectalis muscle is not recommended. In patients with a mixed pattern of CI and pelvic outlet obstruction, surgical intervention alone is often not successful. These patients achieve better results by conservative treatment of pelvic outlet obstruction, followed by a colectomy.

CONCLUSION

Surgical intervention for patients with intractable constipation is rarely necessary. However, thorough preoperative physiologic testing is mandatory for a successful outcome.

Treatment of Hirschsprung's disease in the adult. Report of five cases

PURPOSE

Between 1983 and 1991, five adult patients were diagnosed and treated for Hirschsprung's disease. Mean age was 37 (range, 13-45) years. Three patients had classic Hirschsprung's disease, and two had findings consistent with short segment disease. Each patient had a history of disabling, lifelong constipation.

METHODS

Diagnosis was established with the aid of barium enema study, anorectal manometry, and tissue biopsy.

RESULTS

Three patients with classic disease underwent resection of diseased bowel, rectal mucosectomy, and anastomosis between the ganglion-containing bowel and anus. All three patients had excellent functional improvement in the perioperative period. Two patients with findings consistent with short segment Hirschsprung's disease were treated by anorectal myectomy. Neither patient obtained lasting relief.

Adult Hirschsprung's disease. Results of the Duhamel's procedure

Eleven patients with adult Hirschsprung's disease were treated at Seoul National University Hospital (SNUH, 8 cases) and Chosun University Hospital (CUH, 3 cases) between 1985 and 1992. Of the 11 patients, seven were male. The age of the patients ranged from 11 to 30 years, and all presented with chronic constipation and recurrent faecal impactions that required periodic enemas and laxatives. The Duhamel's operation, as a single or staged procedure, was performed in all patients. Levels of aganglionosis in 9 patients were confined to the rectosigmoid colon (82%). There were three major post-operative complications. Two patients developed fistula-in-ano at the anastomotic site, and one patient developed ileus. However, these complications resolved with conservative management. The longterm results were excellent except for one patient who developed impotence. The mean frequency of bowel movements was usually once or twice a day without the aid of other treatments. Our results indicate that Duhamel's operation is a highly acceptable procedure in the management of adult Hirschsprung's disease.

Severe, longstanding constipation in adults. Indications for surgical treatment

In recent years new techniques for the investigation of colonic motility and defaecation mechanism have been developed. On the basis of the results of these studies it has been suggested that there might be an indication for a surgical approach to the distressing problem of constipation. Because this approach is still controversial, it seems to be appropriate to review the suggested indications for the use of surgery in the treatment of constipation and to discuss the results as reported in the literature so far.