Pleural malignancy

(A) This image shows a pleural effusion with two masses. One is adherent to the diaphragm, the other to the lung. Ultrasonography guided needle biopsy indicated that they were poorly differentiated sarcoma.
(B) This image shows several masses on the diaphragm. These were caused by pleural metastatic breast cancer. Metastatic pleural disease is often located on the diaphragm probably due to gravitational effect that favors deposition of tumor cells to the dependent position.