“…Although rare and controversial, some reports suggest that DI can be reversed [12,17,18]. Particularly, a previous report indicated that hypothalamic-pituitary radiation therapy can effectively reverse DI if it is provided early, namely\14 days after DI diagnosis [18].With regard to anterior pituitary dysfunction, while most reports suggest that it cannot be reversed [6,9,10], Makras et al [19] have described the case of a 35-year-old female who resumed normal menstruation following steroid administration. Case 1 became free from DDAVP several years after treatments with immediate hypothalamic-pituitary radiation therapy for the primary mass and rapid introduction of multiagents' chemotherapy for the recurred CNS mass, but not resumed menstruation.…”