The scientists of Mordovian state university under the leadership of the candidate of medical sciences, the head of the oncology department Mikhail Kulaev elaborated the project the realization of which will help to overcome the one of the most dangerous and hard diseases the cancel. The base of the offered project contains the laser technologies in diagnostics and curing the malignant tumors. In the organism is bringing the special preparation photosensibilisator which is piling up mostly in the tumor, on the surface of which then the laser is directing.  Under the coercion of that two factors in the cage the atomar oxygen springs up and starts the mechanism of its dying.