The article presents the case of twenty-year-old Artem L., whose clinical picture of the disease was dominated by an overvalued hobby in the form of pathological hoarding. The case was analyzed from the standpoint of highlighting a new diagnosis hording in international psychiatric classifications. Differential diagnosis of hording with schizotypal and obsessive-compulsive disorder, as well as with autism spectrum disorders was carried out. It is concluded that the emergence of a new diagnosis of hoarding requires the formation of new algorithms of diagnostic thinking in psychiatrists and the rejection of interpretations of paradoxical, seemingly pretentious behavior as belonging to the circle of schizophrenic disorders.