Pleural and pulmonary ultrasonography.

Eighteen patients (12 with pleural lesion and 6 with pulmonary lesion seen on chest roentgenograms) were taken for study by ultrasound. Thoracocentesis was performed under ultrasound guidance in 10 patients. Final diagnosis was infection in 10 malignancy in 8 patients. There was no characteristic ultrasonic finding that could be used to differentiate between benign and malignant lesions.