Abstract. The categories in the grouping of schizophrenia or other primary psychotic disorders in ICD-11, their diagnostic requirements, the differences with ICD-10, and rationale for the changes, are presented. While the aim of compelling acquaintance in detail with this major grouping in the new classification is mainly didactic, clinical descriptions are accompanied by comment, some critical notes, and hypotheses about possible consequences of the new diagnostic requirements for clinical practice.

Key words: schizophrenia, primary psychoses, ICD-11

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