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Ultrasound scanning
1Dept. of Radiology, St. George's Hospital and Medical School, London, UK.
Insights
Ultrasound reveals bowel wall thickening in inflammatory conditions like Crohn's disease and ulcerative colitis. Specific echo patterns, such as the echo-poor halo, help differentiate these conditions.
Area of Science:
- Gastroenterology
- Medical Imaging
- Pathology
Background:
- Inflammatory and neoplastic bowel diseases manifest as bowel wall thickening.
- Ultrasound imaging visualizes pathological changes within the bowel wall.
Purpose of the Study:
- To describe the ultrasound appearances of inflammatory bowel pathology.
- To correlate specific ultrasound findings with Crohn's disease and ulcerative colitis.
Main Methods:
- Ultrasound examination of the bowel wall.
- Correlation of imaging findings with pathological characteristics of Crohn's disease and ulcerative colitis.
Main Results:
- Crohn's disease, a transluminal condition, shows fibrosis leading to an echo-poor halo around an echogenic center.
- Early Crohn's disease presents a 'ground glass' appearance due to transmural edema and inflammation.
- Ulcerative colitis, a mucosal disease, exhibits less prominent halos; severe edema in fulminant cases reduces haustral and lumen size.
Conclusions:
- Ultrasound is effective in identifying bowel wall thickening associated with inflammatory and neoplastic conditions.
- Characteristic ultrasound features, including the echo-poor halo and its appearance, aid in differentiating Crohn's disease from ulcerative colitis.
Abstract:
Inflammatory or neoplastic bowel pathology is associated with thickening of the bowel wall. Ultrasound appearances reflect the pathological changes in the bowel. Crohn's disease is a transluminal disease leading to fibrosis. This fibrosis is responsible for the formation of an echo-poor halo surrounding a central echogenic zone. In the earlier stages with transmural oedema and inflammation, the halo assumes a ground glass appearance. Ulcerative colitis is a mucosal disease and hence the halo is a less prominent feature. Severe oedema in the bowel wall in fulminant ulcerative colitis can be recognized by the marked reduction of the haustral and central lumen of the colon.
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