Rare and unknown diseases are a modern trend in medicine

Abstract

   Rare and unknown diseases are numerous and heterogeneous, characterized by low prevalence and relatively high mortality and disability rates. There are currently 6000–8000 rare diseases known to the scientific community, with an additional 250–280 new diseases being described each year. Both the difficulty of diagnosis and the lack of effective treatment for many of these diseases are pressing health problems throughout the world. The growing global interest in the problem of rare and unknown diseases and the search for its solution has led to the initiation of projects on rare, unknown and little-studied diseases in many countries.