Rebecca Ottoni

The clinical meaning of obsessive-compulsive symptoms in bipolar disorder and schizophrenia.

The rate of co-morbid obsessivecompulsive disorder (OCD) with both bipolar and schizophrenia spectrum disorders is high. The lifetime prevalence of bipolar disorder (BD) in OCD patients is up to 21.5% and almost 50% of OCD patients have cyclothimic traits (D’Ambriosio et al., 2010). Co-morbid OCD is diagnosed in 8–32% of patients with schizophrenia (SCZ) and in up to 35% of patients with schizotypal personality disorder (de Haan et al., 2013). On one hand, BD-OCD is associated with poorer functioning as compared to ‘pure’ BD or ‘pure’ OCD (Amerio et al., 2014). On the other hand the impact of OC symptoms (OCS) on functioning in SCZ might depend on their severity: OCS might have an improving effect while a fullblown OCD might have a worsening one (de Haan et al., 2013). In line with these findings, preliminary results of our recent study have showed a gradual transition from an improving effect (mild OCS) to a worsening one (moderate–severe OCS) on functioning in SCZ subjects. OC symptoms are mediated by fronto-striato-thalamic circuits which have a crucial role in the regulation of daily master routines and sub-routines. Since these circuits can also be involved in the pathogenesis of BD and SCZ, OCS may have different clinical meanings in these disorders:

Late-Onset Obsessive-Compulsive Disorder Associated with Left Cerebellar Lesion

The onset of obsessive-compulsive disorder (OCD) after age 50 is rare and generally related to an organic etiology. An involvement of fronto-striatal circuits has been strongly suggested, whereas cerebellum remains so far scarcely explored. We present here the description of a “pure” late-onset OCD associated with a cerebellar lesion, neither comorbid with other mental disorders nor with neurological syndromes. To our knowledge, this condition was not previously described in literature. The patient is a 62-year-old woman who developed a late-onset OCD associated with a left cerebellar lesion due to an arachnoid cyst in the left posterior fossa. We debate the possible role of the cerebellar lesion in favoring a transition from a predisposing liability (namely an obsessive-compulsive personality disorder and a depressive status) to the onset of OCD in this woman.

Decrease of functioning in remitted and non-remitted patients 16 years after a first-episode schizophrenia.

Abstract In schizophrenia, a better level of functioning has been generally associated with symptomatic remission. However, this association has been supported by cross-sectional studies or by studies with a short follow-up period. Forty-eight patients with schizophrenia were evaluated by the Positive and Negative Symptoms Scale and the Social and Occupational Functioning Assessment Scale (SOFAS) at the first episode and after a mean period of 16 years. At follow-up, patients were defined as remitters (R) or non-remitters (NR) according to the Remission Schizophrenia Working Group criteria. R (n = 18; 37.5%) compared to NR showed at the first episode a lower illness severity and a better level of functioning. A functional decline was found in both groups at follow-up, even though NR showed a more than twofold reduction than R. Better SOFAS scores at follow-up were predicted by baseline SOFAS score and less severe negative symptoms at follow-up. Schizophrenia implies a functional decline over time, regardless of the symptomatic remission status with negative symptoms playing a major role.

The impact of obsessive dimension on symptoms and functioning in schizophrenia

Obsessive Compulsive Symptoms (OCS) and Disorder (OCD) occur frequently in patients with schizophrenia. Nevertheless the impact of OCS/OCD on clinical characteristics and outcome of schizophrenia remains controversial. The aim of the present study is to examine the effect of obsessive-compulsive dimension on symptom expression and functioning in schizophrenia. Sixty patients affected by schizophrenia completed the SCID-IV, the Positive and Negative Syndrome Scale, the Yale-Brown Obsessive-Compulsive Scale, the Social and Occupational Functioning Assessment Scale and the Strauss and Carpenter Level of Functioning Rating Scale. Obsessive-compulsive dimension was associated neither with positive or disorganization symptoms nor with negative symptoms. By contrast, it adversely affected levels of functioning, with a major impact exerted by compulsions rather than obsessions. Obsessive-compulsive dimension appears to be independent from negative and positive symptoms of schizophrenia and independently decreases social functioning.

Obsessive–compulsive symptoms interact with disorganization in influencing social functioning in schizophrenia

OBJECTIVE Recent research has suggested a dual impact of obsessive-compulsive dimension on functioning in schizophrenia with a gradual transition from an improving to a worsening effect depending on obsessive-compulsive symptoms (OCS) severity (from mild to moderate-severe). Aim of the present study was to investigate whether this varying effect of OCS on functioning might be mediated or moderated by schizophrenia symptom dimensions or occur independently. METHOD Seventy-five patients affected by schizophrenia were administered the Structured Clinical Interview for DSM-IV Disorders, the Positive and Negative Syndrome Scale, the Yale-Brown Obsessive-Compulsive Scale and the Social and Occupational Functioning Assessment. The sample was divided into two groups according to the severity of OCS (absent/mild and moderate/high OCS group). RESULTS In both groups, the effect of OCS on functioning was not mediated by their effect on positive, negative or disorganization symptoms. Conversely, a significant interaction between OCS and disorganization dimension was found: the dual effect of OCS on functioning occurred only among patients with low disorganization symptoms while it was no more apparent at high levels of disorganization. CONCLUSION Data suggest that in patients with schizophrenia, functioning at least in part depends on the interaction between disorganization and OCS.

Obsessive-Compulsive Symptoms in Schizophrenia and in Obsessive-Compulsive Disorder: Differences and Similarities.

Introduction: A growing literature suggests that obsessive-compulsive (OC) phenomena represent a distinct dimension in schizophrenia, independent of nuclear psychotic symptoms. Nevertheless, the OC psychopathologic profile in schizophrenia, compared with “pure” obsessive-compulsive disorder (OCD), has not yet been investigated extensively. This study investigated the clinical features of the OC dimension in patients with schizophrenia compared with patients with pure OCD. Methods: The main psychopathologic features of obsessions and compulsions were rated in 35 patients with schizophrenia and 31 patients with OCD, using the Structured Clinical Interview for DSM-IV Axis I Disorders, the Positive and Negative Syndrome Scale, the Yale-Brown Obsessive-Compulsive Scale, and the Leyton Obsessional Inventory. Results: OC phenomena were indistinguishable in terms of their severity, resistance, interference, and control in both groups. However, patients with OCD showed higher rates of aggressive, contamination-related, sexual, and somatic themes; moreover, in the group with schizophrenia, a positive relationship was found between washing compulsions and delusions and between hoarding obsessions and delusions. Conclusions: These results indicate that patients with schizophrenia exhibit a narrower range of obsessive content compared with patients with OCD; in addition, OC and delusional themes tend to be related in schizophrenia as a unique symptomatic phenomenon.

Obsessive–compulsive symptom severity in schizophrenia: a Janus Bifrons effect on functioning

The impact of obsessive–compulsive symptoms on functioning in schizophrenia is still debated. This study investigated the relationship between OC symptoms and functioning along a severity gradient of obsessive–compulsive dimension. Sixty patients affected by schizophrenia completed the SCID-IV, the Positive and Negative Syndrome Scale, the Yale-Brown Obsessive–Compulsive Scale and the Social and Occupational Functioning Assessment Scale. The relationship between functioning and obsessive–compulsive dimension was described by a reverse U-shaped curve; functioning was positively related to the presence of mild obsessive–compulsive symptoms and inversely related to moderate and severe symptoms, after controlling for the severity of positive, negative, disorganization and general psychopathological symptoms. The role of obsessive–compulsive symptoms on social functioning in schizophrenia occurs along a severity continuum with a gradual transition from a positive correlation (from absent to mild symptoms) to an inverse correlation (for symptoms ranging from moderate to severe) and independently from schizophrenia symptom dimensions.