Points to consider when choosing a biopsy method in cases of pleurisy of unknown origin.

Blind pleural needle biopsy and diagnostic thoracoscopy are procedures sometimes used in the work-up of a patient with pleural effusion of unknown origin. We reviewed 203 diagnostic thoracoscopies in patients with malignant pleural effusion to show the different location of pleural metastasis, some out of the reach of blind needle biopsy. Based on these data, we find diagnostic thoracoscopy a superior procedure because of its higher reliability, faster diagnostic results, slight or no complications, and the possibility of carrying out pleurodesis in the same examination.