Our purpose is to apply fuzzy path integral on differential diagonosis including internal medicine.lt is so difficult to distinguish between anemia from malignant one. As leukemia and aplastic anemia, which is malignant one, has the defects of stem cell(gene) levels, the diagnosis should have essentially fuzzy inference. We investigate an application of the meshod of this fuzzy inference and how to make an expect system for anemic diseases. A simple example of fuzzy path integral is also shown.
