RESUMO
Objective To analyze clinical and CT manifestations of mediastinal type lung cancer,in order to improve the under-standing of its CT signs.Methods 12 cases with mediastinal type lung cancer proved by pathology were analyzed retrospectively.Re-sults The mediastinal type lung cancer can be classified as central type (6 cases),peripheral type (4 cases)and hiding type (2 cases).There were 5 cases in the right upper lung,4 cases in the left lung and 3 cases in the lower lobe of right lung.CT showed irregular soft tissue masses adjacent mediastinum with size of 3-10 cm.7 cases showed homogeneous density and 5 cases showed heterogeneous density.The tumor and lung tissue interface was blurred in 8 cases and clear in 4 cases.5 cases had atelectasis.6 cases showed mediastinal lymph nodes enlargment.Conclusion Mediastinal type lung cancer has relatively specific clinical and CT manifestations;it can help to dif-ferential diagnosis with mediastinal tumors to understand these signs.
RESUMO
Objective To study CT and MR imaging features of pulmonary carcinoma of mediastinal type.Methods CT and MRI data (including anatomic site,size,shape,margin of the tumors and the relationship between tumors and mediastinum) of 15 patients with pulmonary carcinoma of mediastinal type confirmed by surgery and pathology were analyzed retrospectively.All patients underwent plain CT scans,and 11 of them also underwent contrast-enhanced CT scans,and 3 of them underwent plain MR scans and Gd-DTPA enhanced MR scans.Results On CT and MRI,the single mass was located subpleural of mediastinum with wide base.There were 5 cases of small cell lung carcinoma,8 squamous carcinoma,1 adenocarcinoma and 1 adenosquamous carcinoma.The majority of tumors manifested as ellipse.The tumors were lobulated in 12 and spicular margins in nine.8 tumors located in superior mediastinum,5 in medium mediastinum,2 in infra mediastinum and 12 in the borderline between the anterior mediastinum and medinum mediastinum.The tumors and enlarged lymph nodes of hilar and mediastinum connected closely in 7 cases.The bronchus were stenosed or obstructed by the tumors in 9 cases,and metastatic bone destruction of thoracic cage in 4 cases.Conclusion The pulmonary carcinoma of mediastinal type is easy misdiagnosed,CT and MRI findings in combination with clinical data can improve its diagnostic rate.