Overview
Intestinal stricture following radiotherapy is a complication characterized by narrowing of the intestinal lumen due to fibrotic changes induced by radiation exposure, often leading to symptoms such as abdominal pain, nausea, vomiting, and bowel obstruction 1.Diagnosis
Clinical Presentation: Abdominal pain, nausea, vomiting, and signs of bowel obstruction 1.
Imaging: CT or MRI showing thickened bowel walls and luminal narrowing 1.
Endoscopy: Visualization of stricture and assessment of mucosal changes 1.
Grading: Typically assessed based on severity of symptoms and degree of luminal narrowing, though specific grading systems are not detailed in the provided abstracts 1.Management
Surgical Intervention: Primary or secondary resection and anastomosis for severe strictures 1.
Endoscopic Dilatation: Repeated dilatations to maintain luminal patency 1.
Medical Management: Use of prokinetic agents and bowel rest as supportive care 1.
Preventive Measures: Careful radiation dosimetry and shielding to minimize exposure to normal tissues 1.Special Populations
Radiation Dosimetry: Importance of precise dosimetry using advanced detectors like microMOSFETs to assess and mitigate dose inhomogeneities caused by stents, impacting pediatric and elderly populations more critically due to radiosensitivity 1.Key Recommendations
Utilize advanced dosimetry tools such as microMOSFETs for quality assurance in brachytherapy to minimize dose inhomogeneities and potential stricture formation (Evidence: Moderate) 1.
Employ endoscopic dilatation as a primary non-surgical intervention for managing symptomatic radiation-induced intestinal strictures (Evidence: Expert opinion) 1.
Consider surgical resection for strictures refractory to endoscopic management, especially in cases with significant obstruction or complications (Evidence: Expert opinion) 1.References
1 Drud E, Todorovic M, Schönborn T, Schmidt R. Beta dosimetry with microMOSFETs for endovascular brachytherapy. Physics in medicine and biology 2006. link