Fig. 2

Occurrence and change of pleural-based mass was observed by Chest CT. A shows the large amount of pleural effusion in the right chest; B shows that pleural effusion was unapparent after draining the pleural fluid and starting the treatment; C shows the occurrence of a pleural-based mass in the same site of the right chest after four months of chemotherapy; D shows a pleural-based mass resected by surgery, with no recurrence in a year's follow-up