1. An image display device, comprising: a display circuitry configured to display a plurality of pathological slide images, a plurality of cancer index lists, a pathological index cursor and a plurality of index lists; and a display combining circuitry configured to: transmit a request to an information provision circuitry for a cancer index list of the plurality of cancer index lists based on an identifier corresponding to a pathological slide image from the plurality of pathological slide images; receive, from the information provision circuitry, the cancer index list associated with the pathological slide image; display a combined pathological slide image that includes the cancer index list with the pathological slide image, wherein the plurality of cancer index lists are at least one of a type of data including cancer invasion distance data, cancer invasion area data, cancer invasion depth data, cancer staining data, nucleo-cytoplasmic ratio data, etiological microbe number data, or cancer stage classification data, wherein the identifier is at least a slide ID, and wherein the information provision circuitry stores data that links the identifier to the pathological slide image; control the pathological index cursor to illuminate based on a diagnostic threshold value, wherein the pathological index cursor is movable over the pathological slide image; and determine a size of the pathological index cursor based on a size of a sample and a size of the pathological slide image.