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lüll Comorbidity and pathophysiology of obsessive-compulsive disorder in schizophrenia: is there evidence for a schizo-obsessive subtype of schizophrenia?Bottas A; Cooke RG; Richter MAJ Psychiatry Neurosci 2005[May]; 30 (3): 187-93Epidemiologic and neurobiologic evidence suggests that patients with comorbid obsessive-compulsive disorder (OCD) and schizophrenia may represent a special category among patients with schizophrenia. Efforts to examine the neurobiology of this group have focused on neuroimaging studies and neuropsychologic testing. Convergent evidence suggests that there may be a specific pattern of neurobiologic dysfunction in this subgroup of patients accounting for symptom co-expression. This review indicates that future studies should distinguish among (1) apparent obsessive-compulsive symptoms (OCS) that occur only in the context of psychosis and that may overlap with psychotic phenomenology, representing a forme fruste of psychosis; (2) OCS occurring only in the prodromal phase of schizophrenia; (3) neuroleptic-induced OCS or OCD; and (4) OCS or frank OCD occurring concurrently with schizophrenia. We examine the evidence for a putative schizo-obsessive disorder and outline suggestions for identifying OCS in the presence of psychosis.|Diagnostic Imaging[MESH]|Humans[MESH]|Neuropsychological Tests[MESH]|Obsessive-Compulsive Disorder/classification/complications/*physiopathology/psychology[MESH]|Schizophrenia/classification/complications/*physiopathology[MESH]|Schizophrenic Psychology[MESH] |