1. A medical information processing system comprising: a storage configured to store therein a mammography image of a breast of a patient and information indicating an image taking direction of the mammography image; and processing circuitry configured to: set a region of interest in the mammography image; specify position information of the region of interest in a schematic drawing that schematically expresses the breast, on a basis of position information of the region of interest in the mammography image and the information indicating the image taking direction; and output the position information of the region of interest in the schematic drawing.