4例原发性肺动脉恶性肿瘤的CT与MR诊断

CT and MRI Diagnosis of Primary Plumonary Artery Trunk Malignant Tumor

目的分析原发性肺动脉恶性肿瘤的CT及MRI表现,以期提高对该病的诊断准确率。资料与方法回顾性分析4例经手术、病理证实的原发性肺动脉肿瘤患者资料。2例仅行心脏MR平扫及增强,1例分别行MRI及CT检查,1例仅做CT平扫及CT肺动脉造影(CTPA)检查。结果4例经病理证实均为恶性肿瘤,其中3例行心脏MRI检查均诊断为肿瘤,表现为肺动脉腔内软组织信号,另1例行CT增强检查表现为肺动脉内充盈缺损,误诊为肺动脉血栓栓塞。结论原发性肺动脉恶性肿瘤的CT和MRI表现具有特征性,特别是MRI检查对本病的定性诊断更有价值。

Objective To analyze the CT and MR manifestations of primary plumonary artery trunk malignant tumor, in order to improve the diagnostic accuracy. Materials and Methods 4 cases with primary malignan tumors of pulmonary artery conformed by surgery and pathology were analyzed retrospectively. Two case were examined with unenhanced and enhanced MR, one case were examined with CT and MR, other one case only with precontrast CT scanning and CTPA before operation. Results 3 cases were diagnosed initially accurately by MR, the other one case was diagnosed as pulmonaryem- bolism by CT. Conclusion The CT and MR manifestation of primary pulmonary artery trunk malignant tumor is characteristic, recognization of its imaging characteristics of CT and MR can improve the accuracy of the diagnosis.