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Objective: To report 1 case was misdiagnosed as malignant thymoma (MTM) invading pulmonary artery and its diagnosis process, and to summarize the clinical and imaging features of MTM and its treatment. Methods: To retrospectively analyze the diagnostic process of 1 case of MTM invading bilateral pulmonary artery patients, and to have literature review. Resu l ts: Thymomas ranks third in mediastinum tumor incidence, which accounted for 21%~39% of MTM. MTM originated in thymic epithelial cells, divided into the invasive thymoma and thymic carcinoma, high malignancy, infiltration nearby tissue and organ. When MTM was very small, it can cause symptoms. The chest imaging is an important means of diagnosis of MTM. The vast majority of MTM as long as no contraindication, amnesia, all should be treated with operation as early as possible. Most researchers maintain postoperative adjuvant radiotherapy, chemotherapy in malignant thymoma patients according to the specific situation, which reduce the relapse and metastasis of the tumor. Conclusions: The clinical manifestations of MTM specificity is not strong, the main CT showed a mass with irregular, lobulated, along the vascular space and natural space invaded ediastinum, and surrounding tissue boundaries are not clear, enhanced scan showed heterogeneous enhancement of tumor. CT angiography can further identify sites and the relationship between MTM and heart, great vessels or bronchial and lung, raising the rate of accurate diagnosis. MTM is a dangerous disease with a relatively poor prognosis.

恶性胸腺瘤侵及肺动脉误诊为肺血栓栓塞症1例临床分析