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Endoscopic rectal sparing in children with untreated ulcerative colitis
Sanjay R Rajwal1, John W L Puntis, Patricia McClean
1Leeds Teaching Hospitals NHS Trust, United Kingdom.
Insights
Rectal sparing in pediatric ulcerative colitis (UC) affects nearly a quarter of patients and may signal more aggressive disease. This finding suggests a need for closer monitoring and potentially different treatment approaches for these children.
Area of Science:
- Pediatric Gastroenterology
- Inflammatory Bowel Disease Research
- Clinical Endoscopy
Background:
- Ulcerative colitis (UC) typically involves rectal inflammation (proctitis).
- Rectal sparing, or lack of rectal involvement, is unusual in UC and may indicate disease severity.
- This study investigated the prevalence and prognostic implications of rectal sparing in pediatric UC.
Purpose of the Study:
- To determine the frequency of rectal sparing in newly diagnosed, untreated pediatric ulcerative colitis.
- To assess the prognostic significance of rectal sparing in terms of disease severity, treatment response, and long-term outcomes.
Main Methods:
- Retrospective review of medical records of children with untreated UC (1996-2001).
- Patients categorized into two groups: proctitis (Group 1) and rectal sparing (Group 2) based on initial endoscopy.
- Comparison of clinical features, treatment response, disease intractability, relapse rates, and need for surgery.
Main Results:
- Twenty-three percent of children (7/30) exhibited rectal sparing at diagnosis.
- Children with rectal sparing had significantly lower remission rates with initial medical treatment (43% vs. 87%).
- Rectal sparing was associated with a higher (though not statistically significant) intractability index and an increased need for colectomy.
Conclusions:
- Rectal sparing occurs in 23% of pediatric ulcerative colitis cases and does not correlate with initial symptoms.
- The presence of rectal sparing may indicate a more aggressive disease course that is less responsive to medical management.
- This finding highlights the importance of endoscopic evaluation for rectal involvement in pediatric UC prognosis.
Background:
Ulcerative colitis (UC) typically is associated with a confluent proctitis, whereas rectal sparing may be seen in large bowel Crohn disease (CD). A few studies have reported rectal sparing in UC and suggested that this might indicate a more severe form of the disease. This study aimed to determine the prevalence and prognostic significance of rectal sparing in children with newly diagnosed, untreated UC.
Methods:
The records of all children with untreated UC presenting to a regional pediatric gastroenterology service between January 1996 and December 2001 were retrospectively reviewed. Patients were divided into two groups according to the endoscopic appearance of the rectum: Group 1 (proctitis) and Group 2 (rectal sparing). Clinical features, intractability index (duration of active disease as a proportion of length of follow-up), response to treatment, relapse index (number of recurrences per year), and the need for surgery were compared.
Results:
Thirty children with untreated UC were identified. Seven (23%) had rectal sparing at initial endoscopy, but disease distribution was otherwise similar in both groups. Presenting symptoms were similar in those with and without rectal sparing. In Group 1, 20 (87%) children achieved remission with initial medical treatment, compared with 3 (43%) in Group 2 (P < 0.05). The intractability index was higher in children with rectal sparing, but the difference was not statistically significant (P = 0.22). During a median follow-up period of 2 years, one (4%) child in Group 1 and two (29%) children in Group 2 experienced primary sclerosing cholangitis, and two (29%) children with rectal sparing required colectomy, compared with none in Group 1.
Conclusions:
Endoscopic rectal sparing was seen in 23% of children with newly diagnosed, untreated UC, but this feature did not correlate with presenting symptoms. However, the presence of rectal sparing may indicate more aggressive disease that is less responsive to medical treatment.
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