[Obsessive-compulsive and related disorders according to ICD-11 and DSM-5 : With brief consideration of the new obsessive-compulsive disorders olfactory reference disorder and hypochondriasis].

This article summarizes the current state of research with respect to the new obsessive-compulsive and related disorders (OCRD) grouping according to the International Statistical Classification of Diseases and Related Health Problems (ICD-11) and the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). The ICD-11 grouping of OCRD is based on common clinical features, such as repetitive undesired thoughts and repetitive behavior and is supported by the literature and empirical data from the fields of imaging and genetics. The disorders in this grouping in ICD-11 include obsessive-compulsive disorder, pathological hoarding, body dysmorphic disorder, trichotillomania, excoriation disorder, and as new disorders differing to DSM‑5, hypochondriasis, olfactory reference disorder and Tourette syndrome. The aim of the OCRD grouping is an improvement of the diagnostics and appropriate treatment strategies as well as a further stimulation of research. The new disorders olfactory reference disorder and hypochondriasis are presented and discussed.