1. An information processing system which supports a pathological diagnosis based on a tissue sample image which is obtained by imaging a body tissue, the system comprising: a pathological diagnosis unit which performs a pathological diagnosis based on the tissue sample image and outputs a first pathological diagnosis result; an input unit which inputs a second pathological diagnosis result obtained by a pathological diagnosis performed by a pathologist based on the tissue sample image; and an output unit which outputs information necessary for a post process corresponding to combination of the first pathological diagnosis result and the second pathological diagnosis result.