[Natural beta-interferon for local use in the treatment of metastatic pleural effusion caused by neoplasm of the breast].

The authors intended verifying the effectiveness of natural beta-interferon in the treatment of metastatic pleural effusion from breast's cancer. 24 patient, with an average age of 54, were studied. The objective responses were: 2 Complete Responses, 8 Partial Responses, 6 Stationarity and 5 Progression. The responses seem independent from the association of systemic treatment. Clinical response has been observed in patients with initial pleural effusion less than or equal to 1000 cc.