Definitions for "Tissue Expander"
Type of breast reconstruction. The skin where the breast was is slowly stretched by an inflatable implant until it is the same size as the natural breast.
Breast shape is created by placing an inflatable envelope under the skin and muscle. Over several weeks it is expanded gradually by injections of salt water.
Inflatable implant. It is inserted under the skin and tissue that needs to be expanded (e.g., chest skin post-mastectomy). Once expanded over a several month period, a breast implant replaces the expander.