The resection of the thoracic wall for cancer, traumas or results of radiotherapy could require a reconstruction of the same wall with prosthetic material of different nature to the purpose of protect the important intrathoracic structures, avoid the flail chest and maintain a ventilation adjusted with aesthetically acceptable results. Numerous and varied they have been and they are the materials used to such aim, but the more numerous experiences concern the reconstructions of the wall with the employment of nets of Marlex or the patch of Gore-Tex. In the complete two years eight patients have arrived at our observation in which a prosthetic reconstruction has been performed with heterologous material. In three of them has been used the net of Marlex, in five the patch of Gore-Tex of two millimeters of thickness. The prostheses have stayed well you bear and in all the patients the authors have gotten a good stabilization of the thoracic wall.