Since the end of the year 2000 a group of interested people has been working on the subject of quality improvement in breast cancer. Within this framework the project "improvement of breast cancer treatment by telemedicine" was started. Based on a workflow analysis and interviews with patients as well as health professionals, it turned out that there are gaps and flaws in the communication process. These problems occurred between health professionals involved in the treatment of patients and between health professionals and patients as well. As a result a telemedicine network has been developed which is based on MPLS technology. Within this network a central communication unit facilitates optimization of the workflow for the treatment of breast cancer. It will also be possible to set up groups for integrated care. Currently the system is being evaluated in specific breast centres in Hamburg. As the net is based on a positive business plan, it can be foreseen that a broad implementation will follow.