医学影像英语每日读丨114.The Fat Halo Sign

每天朗读一段医学影像学英语文章

朗读者：YWT领读

Notes:

1. The Fat Halo Sign 脂肪晕征

2. submucosa [ˌsʌbmju:'koʊsə] n. 黏膜下层

3. muscularis ['mʌskjʊlærɪs] 肌层

4. propria ['proʊpri:ə] 固有层

5. mucosa [mju:'koʊsə] n. 黏膜

6. serosa [sɪ'roʊsə] n. 浆膜

7. pathognomonic [pəˌθɒgnə'mɒnɪk] adj. 特殊（病征）的，特定的，（病征）能确定诊断的

8. inflammatory [ɪnˈflæmətɔ:ri] adj. 炎性的，发炎的

9. cytoreductive [sɪtəɪ'dʌktɪv] 细胞减少性的

10. graft [græft] n. 移植

11. gastrointestinal [ˌgæstroʊɪnˈtestɪnl] adj. 胃肠的

12. obesity [oˈbisɪti] n. 肥胖症

The fat halo sign refers to a feature seen on CT examination of the abdomen, and represents infiltration of the submucosa with fat, between the muscularis propria and the mucosa. It is characterised by an inner (mucosa) and outer (muscularis propria and serosa) ring of enhancing bowel wall along with a non-enhancing middle layer (submucosa).

The submucosal fat halo used to be considered nearly pathognomonic of inflammatory bowel disease (Crohn disease and ulcerative colitis) or less commonly due to cytoreductive therapy and graft versus host disease.

However, a retrospective review of 100 consecutive CT exams performed for reasons other than gastrointestinal disease found the fat halo sign in 21% of subjects, leading to the conclusion that "in the absence of clinical or radiologic evidence of inflammatory bowel disease, the presence of the fat halo sign may represent a normal finding that is possibly related to obesity.”

From: radiopaedia.org

翻译：妙然

【Fat halo sign 脂肪晕征】
脂肪晕征是腹部CT中可见的一种特征性表现，表示脂肪浸润到黏膜下层，位于固有肌层和黏膜层之间。特征性表现是内层（黏膜层）和外层（固有肌层和浆膜层）肠壁有环形强化，中间层（黏膜下层）无强化。
黏膜下层的脂肪晕征过去常被认为是肠道炎性疾病的特征表现（比如克罗恩病和溃结），少数可见于细胞减毒治疗和移植物抗宿主反应的疾病。
但是，根据回顾性调查，100位非肠道疾病患者的CT中，21位也发现了脂肪晕征的表现。因此可以得出这样的结论：“在缺乏肠道炎性疾病的临床表现和影像证据时，脂肪晕征也可以是正常的表现，可能与肥胖有关。”

来源：每天朗读一段医学影像学英语文章

圈主

深圳市人民医院放射科副主任医师杨敏洁

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