[Chronic leukemia coexisting with hypophyseal tumor]

The author describes a case of hypophyseal tumor coexisting with chronic leukaemia. It is suggested that both these processes coexisted from the very beginning of the disease. Development of hypothalmo-hypophyseal system failure was due to the presence of hypophyseal tumour while intensification of these manifestations in the last stage of the disease was caused by the presence of leukaemic changes in the central nervous system.