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Gastroschisis is due to a congenital anterior abdominal wall defect usually to the right of the umbilicus which results in the evisceration of abdominal contents. The incidence of the condition appears to be increasing.1 During the past four decades, advances in neonatal care, parenteral nutrition, and surgical materials and technique have improved the outlook for gastroschisis to the extent that 90% of affected babies now survive.2 The abnormal character of the bowel at birth and the prolonged initial ileus might be expected to predispose to future bowel obstruction, malabsorption, abnormal bowel habit, or chronic abdominal pain. Previous outcome studies have been limited by small numbers of patients,3-7 follow up for mean periods of less than 10 years,8 9 or by analysis of data concentrating on survival and reoperation.10 Few studies have attempted to trace adult survivors and many have confused the issue by analysing all congenital anterior abdominal wall defects and therefore including the very different condition of exomphalos.5-7 10 11The aim of this study was to assess the long term outcome of an early cohort of patients operated on for gastroschisis in a regional neonatal surgical unit.
Subjects and methods
All children with gastroschisis referred to a regional neonatal surgical unit between 1972 and 1984 inclusive, and who survived for more than one year, were included in the study. Case notes were retrieved and reviewed. Attempts were made to trace each subject by contacting their local paediatrician, general practitioner, and local family health authority and they were then sent a written invitation to be interviewed by telephone. All interviews were conducted in a standard, structured fashion by a single person (BWD). Subjects were questioned on their general health and fitness, height and weight, presence of abdominal symptoms, aspects of abdominal wall cosmesis, and education and employment. Birth weights were replotted on modern nine centile charts to allow comparison with current weight and height.12 13 The patient’s height was compared with their parents’ to see if their adult height potential had been achieved: for boys, sum of parents’ height (cm), divided by two, plus seven (range +/− 10 cm); for girls sum of parents’ height (cm), divided by two, minus seven (range +/− 8.5 cm). Deaths were investigated with the help of the Office for National Statistics.
Thirty five children were treated for gastroschisis between 1972 and 1984, and survived for more than one year. Two patients died subsequently; one was healthy and died after an accident at the age of 2 years, and the cause of death in the other is unknown. Seven children could not be traced; one had been adopted in the first year of life and six had moved out of the area with no record of their forwarding address. Three subjects declined to be interviewed. Consequently, data on 23 (70%) survivors with a median age of 16 years (range 12–23 years) were available for analysis. These 23 patients are comparable with the group as a whole, although their initial hospital stay tended to be less complicated (table 1).
All but one of the subjects (96%) described their general health and fitness as good or excellent. Five subjects have relatively minor ailments (one each with eczema, asthma, peptic ulcer disease, chronic diarrhoea, and gynaecological symptoms). Only one individual considered herself in poor health which, after investigation, was found to be due to chronic anaemia secondary to menorrhagia.
All subjects have shown good growth (fig 1). In contrast with birth weight distributions, none are below the third centile for weight and only one is below this standard for height. In comparison with midparental height, 13 (68%) are within the target centile range (that is, have achieved or are set to achieve their height range, as determined by parental heights), four (21%) are taller and two (11%) are shorter. In four cases, data on parental height were not available.
FURTHER SURGERY AND COSMETIC CONCERNS
Sixteen (70%) subjects have undergone further surgery which was related to gastroschisis in eight cases (table 2). Two children have had operations for adhesive intestinal obstruction at 9 and 13 years of age, both of whom had undergone uncomplicated primary gastroschisis repair. One 12 year old girl underwent a laparoscopy for undiagnosed abdominal pain by a local general surgeon. No pathology was identified, minimal adhesions were noted, and she has subsequently remained well.
All patients in this cohort were left without an umbilicus after gastroschisis repair. Thirteen (57%) admitted that this had been distressing during childhood. Both boys and girls had been affected and cited instances of being teased at school when participating in sporting activities. Fortunately, 15 (65%) no longer found this upsetting. The presence of an abdominal scar had caused less concern and only four (17%) individuals were dissatisfied by the appearance; two have had revisional surgery as adults both for wound discomfort and cosmetic reasons, and one adolescent is awaiting scar revision.
Six (26%) subjects admitted to mild, self limiting episodes of abdominal pain which did not interfere with their lifestyle. One girl suffers from more severe abdominal pain and has had treatment for peptic duodenal ulceration and intra-abdominal adhesions. There were no reports of vomiting, and only one of regular indigestion.
Nineteen (83%) subjects have normal bowel function, two have a tendency to mild constipation, and one boy, who had gastroschisis complicated by small bowel atresia, suffers from chronic diarrhoea.
SCHOOLING AND EMPLOYMENT
Twelve children are still at school, but all except one of the remaining older subjects have not progressed to higher education. Five of these are in full time employment, one in part time employment, and three are unemployed. The woman with chronic anaemia is not working due to ill health.
SOCIAL AND REPRODUCTIVE
Twenty subjects still live in their family home, while three are married or cohabiting. Two women have had a total of three pregnancies resulting in one healthy baby, one miscarriage, and one termination of pregnancy. Thirteen were aware that gastroschisis was not considered an inheritable condition, nine did not know, and one thought that offspring were at risk.
This study documents the longest recorded outcome of a cohort of survivors of gastroschisis. All but one were in good health with no significant limitation of lifestyle and one woman had managed a successful pregnancy. Despite the frequent presence of intrauterine growth retardation, the survivors of uncomplicated gastroschisis eventually achieve relatively normal growth. While this observation has been disputed,10 more detailed studies have shown that catch up growth occurs throughout childhood, mostly within the first five years, leading to normal centile ranks in older children.6 8 9 Children with gastroschisis complicated by intestinal atresia fare less well,8 and both of our subjects with an atresia were below the 25th centile for weight.
Late gastroschisis related mortality beyond infancy is rare and often due to unrelated pathology.8 10 In uncomplicated gastroschisis, late morbidity is uncommon and any further related surgery is usually as a result of adhesive intestinal obstruction, a ventral hernia, or undescended testes. It has been suggested that the matted bowel in gastroschisis is at less risk of subsequent adhesive intestinal obstruction.14 This comment, however, was based on a six year follow up of only six children. Two (9%) of our subjects required laparotomy for relief of adhesive bowel obstruction at nine and 13 years after their gastroschisis repair; late adhesive obstruction has not been previously reported. The severity of adhesion formation after gastroschisis repair appears to be very variable, but mechanical bowel obstruction clearly represents a small but significant long term risk. Ventral hernia repair has been necessary in 10% or more of survivors in some longer term studies7 8 15 but, with the judicious use of staged silo repair and meticulous fascial closure, this should now be a rare complication.
Chronic recurrent abdominal pain was reported by a quarter of our subjects. Shorter term follow up studies have recorded a higher prevalence of this symptom,6 9 which may indicate that either spontaneous improvement or adaptation occurs with age. Investigations in such patients have generally found no pathology,6 8 but pathological acid gastro-oesophageal reflux was present in four of 13 symptomatic patients in one study.9 Swartz et al found that chronic abdominal complaints in general were confined to those who had undergone intestinal resection as well as gastroschisis repair.8 To our knowledge, acute appendicitis has never been described in a patient with a previously repaired gastroschisis, which is fortunate since the gastroschisis bowel is typically non-rotated and thus the appendix may well be abnormally sited. The neonatal appendix in gastroschisis is typically short and wide which might protect against acute appendicitis, but it is unknown whether the appendix subsequently remains in this state.
Absence of an umbilicus caused distress to more than half of our subjects and this was most acute in adolescents. Lindham described similar results in Swedish patients,6 but fewer North American or Austrian children were affected, which may reflect study methodology or cultural differences.9 10 Current surgical methods should aim to conserve the umbilicus whenever possible.16
Gastroschisis is frequently detected antenatally and many prospective parents now receive prenatal counselling. Early outcome and prognostic factors are well established. This study shows that most babies surviving infancy after repair of gastroschisis can expect to become healthy adults.
We wish to thank Mr JM Beck and Mr DFM Thomas for allowing us to study their patients and we are grateful to our regional paediatric colleagues, general practitioners, and Mr DCG Crabbe for information which enabled us to trace some of these patients.
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