The tool can be used for constructing family trees. It is designed to help the general practitioner (GP) assess and communicate genetic risk information to women who are worried about their personal risk of different cancers. The tool allows a family tree to be constructed for the presenting patient, incorporating information on the incidence of cancers in the family. The decision support module provides an assessment of risk level and recommendations for patient management, along with an explanation for the conclusions reached. In this way, the tool helps put patients into the position whereby they can make make personal healthcare decisions.