On a medical report editing screen, comments on a lesion are entered as selective input data through a lesion describing template having term selection buttons. The selective input data are stored in a database in association with a lesion ID given to each lesion. To describe another similar lesion in the same report, a copy of the previous template is displayed as an additional tab reproducing the same condition as the previous template. By searching using the selective input data or the lesion ID, data of past medical reports on the same lesion are retrieved from the database. Using the retrieved data, information on the course of this lesion is displayed. A template describing the same lesion in the past medical report is usable for describing the lesion in the present report, and the selective input data of the present report is stored with the same lesion ID used previously.