My great thanks to Alexander Vladimirovich Leontiev. After oncological surgery and radiation therapy, I suffer from a very unpleasant disease: radiation proctitis. These are pains and bleeding. In the direction of Leontiev, I underwent 30 sessions of hyperbaric oxygenation at the Sklifosovsky Institute. The bleeding has almost stopped, I feel better. Thank you, Alexander Vladimirovich, I really hope with your help to overcome my illness.