良恶性胸腔积液的CT特征

目的 分析良恶性胸腔积液及胸膜增厚的cT表现，探讨两者间的不同特点。方法 分析145例经临床及病理证实的良恶性胸腔积液（良性68例，恶性77例）的CT征象。结果 145例胸腔积液中有115例伴有不同程度的胸膜增厚，根据其形态的不同可分为6种类型（恶性4型，良性2型）。结论 仅凭胸腔积液的密度不能区别其良恶性，胸膜的增厚有鉴别诊断意义，恶性胸腔积液的特点为胸膜明显增厚，一般大于10mm，且厚薄不均匀。良性胸膜增厚较轻，多小于10mm，且均匀一致。

CT features of benign and malignant pleural effusion

Objective To analyze and to differentiate the CT findings of benign and malignant pleural effusion associated with pleural thickening. Methods CT signs of 145 patient who included clinically and pathologically proved 68 benin pleural effusion and 77 malignant pleural effusion were agnalyzed retrospectively. Results Among 145 patients with pleural effusion, 115 eases more or less associated with pleural thickening which morphologically could be divide into six patterns, i. e. four kinds of malignant and two kinds of benign pleural effusion. Conclusion Only based on the density of the effusion for differentiating benign from malignant pleural effusion is impossible while CT signs of pleural thickening are very helpful to differentiate the both, for example , malignant plcural thickening is often more than 10 mm and nonhomogeneous thickening, quite the eontary, benign pleural thickening is usually less than 10 mm and homogeneous thickening.