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Subtle Pleural Metastasis without Large Effusion in Lung Cancer Patients: Preoperative Detection on CT

Hwang, Jung Hwa    (Department of Radiology, Soonchunhyang University Hospital, Seoul, Korea.   ); Song, Koun-Sik    (Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Korea.   ); Park, Seung-Il    (Department of Thoracic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Korea.   ); Lim, Tae-Hwan    (Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Korea.   ); Kwon, Kui Hyang    (Department of Radiology, Soonchunhyang University Hospital, Seoul, Korea.   ); Goo, Dong Erk    (Department of Radiology, Soonchunhyang University Hospital, Seoul, Korea.  );
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    Objective We wanted to describe the retrospective CT features of subtle pleural metastasis without large effusion that would suggest inoperable lung cancer. Materials and Methods We enrolled 14 patients who had open thoracotomy attempted for lung cancer, but they were proven to be inoperable due to pleural metastasis. Our study also included 20 control patients who were proven as having no pleural metastasis. We retrospectively evaluated the nodularity and thickening of the pleura and the associated pleural effusion on the preoperative chest CT scans. We reviewed the histologic cancer types, the size, shape and location of the lung cancer and the associated mediastinal lymphadenopathy. Results Subtle pleural nodularity or focal thickening was noted in seven patients (50%) having pleural metastasis and also in three patients (15%) of control group who were without pleural metastasis. More than one of the pleural changes such as subtle pleural nodularity, focal thickening or effusion was identified in eight (57%) patients having pleural metastasis and also in three patients (15%) of the control group, and these findings were significantly less frequent in the control group patients than for the patients with pleural metastasis ( p = 0.02). The histologic types of primary lung cancer in patients with pleural metastasis revealed as adenocarcinoma in 10 patients (71%) and squamous cell carcinoma in four patients (29%). The location, size and shape of the primary lung cancer and the associated mediastinal lymphadenopathy showed no significant correlation with pleural metastasis. Conclusion If any subtle pleural nodularity or thickening is found on preoperative chest CT scans of patients with lung cancer, the possibility of pleural metastasis should be considered.


  • 주제어

    Pleura, neoplasm .   Computed tomography (CT).  

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