Abstract
Background. The purpose of this article is to describe the current system of childhood cancer registration in Belarus and the main principles of organization of Childhood Cancer Sub-registry of Belarus including the retrospective and prospective (formalized and visualized) data collection.
Conclusions. The use of visualized data of the initial diagnostic system not only helps to optimize the prospective recording in the cancer registry, but also contributes to the better verification of individual cases that is sometimes required in the retrospective research and in cases of changes in classification of malignant neoplasm.