[Is there a need for a revised classification in diabetes mellitus?].

Diabetes mellitus is a cluster of diseases with heterogeneous etiopathogenesis and clinical nature. The exact classification of certain cases is of decisive importance in terms of the optimal choice of treatment. However, the classification is still not completely resolved, despite the available, ever-expanding tool park and rapidly expanding knowledge. Therefore, new recommendations are made to clarify the grouping. This article reviews the classification guidelines created between 1965 and 2019 based on international consensus, with the coordination of the World Health Organization (WHO), as well as the proposals made based on recent tests and observations. It states that for daily practice, the present WHO guideline is still the most orienting. In addition, in cases of uncertain classification, it is essential to follow up the patients and repeat the examinations as necessary, until the nature of the specific form of the disease is clarified. Orv Hetil. 2022; 163(48): 1909-1916.