The investigators therefore propose a phase I study to determine the maximum tolerated dose and the recommended dose for phases II, studying the pharmacokinetics of intrapleural bevacizumab administered by an implantable device after evacuating a symptomatic metastatic pleurisy as part of a mammary carcinoma. The VEGF intrapleural levels and serum will be study and the time until a new puncture. Dyspnea will be evaluated as well as its impact on quality of life.