Why tuberculosis causes pleural effusion?
pleural effusion is a secondary disease being related to tuberculosis or other lung disease such as TB, pneumonia etc… because there is irritation on the lining of pleural cavity, thus altering the permeability of the membrane and decreasing the oncotic pressure needed to drain the excess fluid in the pleural space. normally there is a small amount of pleural fluid in the pleural space that lubricates the parietal and visceral pleura during expiring and inspiring..
