纵隔乏脂性畸胎瘤(teratoma)平片和CT描述中英文对照

The frontal radiograph (image A) shows a soft tissue density in the mediastinum (image A, red arrow), with the hilum overlay sign on the left (image A, orange arrow), suggesting the mass is in a mediastinal compartment separate from the middle mediastinum. Correlated axial CT imaging shows a heterogenous mass with cystic areas (image B, yellow arrows), as well as calcifications (image B, green arrow). While no fat-density is seen in this mass, the multiple cystic areas with calcification is suggestive of teratoma.

正位X线片（图A）显示纵隔内软组织密度（图A，红箭），左侧肺门重叠征(hilum overlay sign)（图A，橙色箭），表明肿块位于纵隔腔内，与中纵隔分隔。 相关轴位CT影像显示具有囊性区域的不均匀密度肿块（图B，黄色箭头），肿块内可见钙化（图像B，绿色箭头）。虽然在该肿块中未见脂肪密度，但伴有钙化的多发囊性区域提示为畸胎瘤。

知识点：肺门处的边缘遮盖征称为肺门重叠征（hilum overlay sign）。用以判断胸片上肺门区病变的位置。如果可以清楚地看见病变内的肺门血管，则病变位于肺门前后。如果不能看见肺门血管，则病变位于肺门。

来源：Katherine J. Blair, M.D. and Emma C. Ferguson, M.D.Mediastinal Mass Mania! Radiographic and Cross-Sectional Correlation of Common Mediastinal Neoplasms.McGovern Medical School at University of Texas Health Science Center at Houston- Department of Diagnostic and Interventional Imaging