Methods: Peritoneal brush cytology was performed with brush made by ourselves in 28 patients with malignant ascites, as compared with biopsy and routine cytology analysis in ascitic fluid specimen.

The positive rate of malignant cells in ascitic fluid specimen was 96.4% after biopsy together with brush cytology.

Objective To study the diagnostic value of pulmonary carcinoma via fibrobronchoscope brush biopsy, protractor biopsy and sputum cytology.