Spooner E W, Kuhns L R, Stern A M
AJR Am J Roentgenol. 1977 Jan;128(1):23-5. doi: 10.2214/ajr.128.1.23.
A band of increased density paralleling the left lower border of the cardio-pericardial silhouette is seen on anteroposterior chest films in some children with pericardial effusions. To analyze the incidence and accuracy of this sign, films of children with pericardial effusions and controls were compared. Among 17 children with proved pericardial effusion, bands of density within the cardio-pericardial silhouette were seen in six films, while positive epicardial fat pad signs were seen on four. When three radiologists without experience in use of the sign evaluated radiographs of the six patients with the sign and six controls without pericardial effusion, the sign was detected in most instances in the children with effusions (specificity and sensitivity, 83%). In vitro studies of unpreserved hearts in baths of solutions of varying osmolarity failed to show detectable differences in density between myocardium and any of the solutions. We conclude that the new sign may be produced by epicardial fat adjacent to pericardial fluid.
在一些患有心包积液的儿童的前后位胸片上，可以看到一条与心-心包轮廓左下缘平行的密度增加带。为了分析该征象的发生率和准确性，对患有心包积液的儿童和对照组的胸片进行了比较。在17例经证实有心包积液的儿童中，在心-心包轮廓内可见密度带的有6例胸片，而可见阳性心外膜脂肪垫征象的有4例。当3名不熟悉该征象的放射科医生对6例有该征象的患者和6例无心包积液的对照组的X线片进行评估时，在大多数有积液的儿童中检测到了该征象（特异性和敏感性为83%）。在不同渗透压溶液浴中对未保存心脏进行的体外研究未能显示心肌与任何一种溶液之间在密度上有可检测到的差异。我们得出结论，这个新征象可能是由心包液附近的心外膜脂肪产生的。
