A rapid growth of diagnostic and treatment options has been observed in hematooncology during last two decades. Modern oncology treatment is very expensive. As a result of the growing costs, there is a need to evaluate achieved outcomes with respect to evidence-based medicine and cost-effectiveness. These requirements make physicians and other specialists to collect and analyze all meaningful population data continuously. The collection of data, which do not take in account fundamental diagnostic and treatment principles of the actual diagnostic group is entirely ineffective and unmaintainable. The National Oncology Registry in its general design does not respect basic principles of diagnostics and treatment of hematooncologic diseases and the collected data are devaluated and unusable. In our article we propose a dataset for the purpose of population database of hematooncologic diseases, which would be meaningful and acceptable for hematologists and which would be able to provide sufficient essential data for a relevant population evaluation even for the top management of the Czech health service.

        Key words: data collection and analysis, database, National Oncology Registry