医学影像英语每日读丨91.Air Crescent Sign

每天朗读一段医学影像学英语文章

朗读者小风侠

An air crescent sign describes the crescent of air that can be seen in invasive aspergillosis, semi-invasive aspergillosis or other processes that cause pulmonary necrosis. It usually heralds recovery and is the result of increased granulocyte activity.

In angioinvasive fungal infection, the nodules are composed of infected haemorrhagic and infarcted lung tissue. As the neutrophil count recovers and the patient mounts an immune response, peripheral reabsorption of necrotic tissue causes the retraction of the infarcted centre and air fills the space in between. This creates an air crescent within the nodules and is a good prognostic finding because it marks the recovery phase of the infection. This sign is seen in approximately 50% of patients.

From: radiopaedia.org

【Air Crescent Sign 空气半月征】

空气半月征可见于侵袭性曲霉菌、半侵袭性曲霉菌入侵肺部,或其他导致肺组织坏死的一些疾病,在病灶内形成的新月形气体影。该征象通常提示病变在恢复,是由于粒细胞活动增多导致。

在真菌入侵血管时,病灶结节由感染后出血和梗死的肺组织组成。随着中性粒细胞计数的升高,患者产生免疫反应,外周的坏死组织逐渐吸收,导致梗死中心回缩,气体充满空隙。因此在结节内形成了半月形的气体影,提示预后良好,表示感染的恢复期。空气半月征可见于约半数此类疾病的患者。

Notes:

1. air crescent sign 空气半月征

crescent [ˈkrɛsənt] n. 新月

2. aspergillosis [ˌæspərdʒɪˈloʊsɪs] n. 曲霉病

3. pulmonary necrosis 肺坏死

4. granulocyte ['grænjələˌsaɪt] n. 粒细胞

5. fungal [ˈfʌŋɡəl] adj. 真菌的

6. haemorrhagic adj. 出血的

7. infarcted [ɪn'fɑ:ktɪd] adj. (血管) 梗塞的

8. neutrophil ['nju:trəfɪl] n. 嗜中性粒细胞

9. peripheral [pəˈrɪfərəl] adj. 外围的; 次要的; (神经) 末梢区域的

10. retraction [rɪˈtrækʃən] n. 缩回

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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