270.Strictures in Crohn's disease（5）

每天朗读一段医学影像学英语文章

Other conditions can cause small bowel strictures.  An ischemic stricture is usually a solitary, smooth surfaced narrowing, with gradually tapering margins. Strictures complicating radiation enteropathy are luminal narrowings associated with smooth, thick folds perpendicular to the longitudinal axis. If very long-standing, radiation strictures may be smooth circumferential "tubular" narrowings. Annular constricting tumors, either primary or metastatic, are sharply demarcated, often with pronounced shoulder formations.  Very rarely in the chronic stage of ulcerative jejunoileitis, short annular constrictions separating dilated segments are present. Strictures related to non-steroidal anti-inflammatory agents are typical short, smooth ring-like narrowings in the ileum.

其他情况可引起小肠狭窄。缺血性狭窄通常是单发的、表面光滑的狭窄，边缘逐渐变细。狭窄合并放射线肠病是与垂直于纵轴的平滑、厚皱褶相关的管腔狭窄。如果存在很长时间，辐射狭窄可能是平滑的周向管状狭窄。无论是原发性还是转移性的环状、收缩性肿瘤，界限都很明显，常常伴有明显的肩胛结构。溃疡性空肠炎的慢性期很少出现短的环形收缩:分隔扩张的节段。与非甾体抗炎药相关的狭窄是典型的回肠短而光滑的环状狭窄。

Notes:

1. ischemic [ɪs'ki:mɪk] 缺血性的

2. enteropathy [ˌentə'rɒpəθi:] n. 肠病，肠下垂

3. luminal ['lju:mɪnæl] n.鲁米诺（一种镇静剂）

luminal narrowing 管腔狭窄

4. perpendicular [ˌpɜ:rpənˈdɪkjələ(r)] adj.垂直的

5. demarcate [ˈdi:mɑ:rkeɪt] vt. 定…的界线，区分

6. ulcerative ['ʌlsərətɪv] adj. 溃疡（性）的

7. jejunoileitis [dʒi:dʒu:nɔɪ'lɪaɪtɪz] 空肠回肠炎

8. steroidal [医] 甾体的

9. ileum [ˈɪliəm] n. 回肠