Regarding small bowel malignant lesions,
1. 60-70% of the small bowel symptomatic lesions are malignant
2. Adenocarcinomas are most commonly seen near ileocaecal junction
3. Most of the carinoids airse from the distal ileum
4. Carcinoids typically show avid contrast enhancement, desmoplastic reaction and calcification
5. Kaposi's sarcomas are typically seen as submucosal lesions in the jejunum or ileum
Answers: T, F, F, T, T
Notes:
Nearly 70% of symptomatic small bowel tumours are malignant. Adenocarcinomas are most commonly seen in the duodenum. 40% of small bowel tumours are carcinoids. One third of carcinoid arise from the small bowel (most common site is appendix - 50%). Carcinoids typically avidly enhance, show desmoplastic reaction and calcification. Bowel is affected in up to 40% of Kaposi's sarcoma.
Reference:
Ramchandran L et al. Multidetector row CT of small bowel tumours. Clinical Radiology. Volume 62. Pages 607-614
