Delusional disorder is an illness characterized by the presence of nonbizarre delusions in the absence of other mood or psychotic symptoms. Diagnostic Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR) (APA, 2000) defines delusions as false beliefs based on incorrect inference about external reality that persist despite the evidence to the contrary and these beliefs are not o...

BACKGROUND Nothing is known about the prevalence of delusional infestation in veterinary practice and the consequences for psychiatrists. AIMS We attempted to examine the frequency of delusional infestation among pet owners presenting their animals to veterinary clinics. METHOD We conducted a survey among 32 663 veterinary clinicians who were members of the Veterinary Information Network. ...

Our modern conception of delusional disorder is based on Kraepelin's original formulations. He noted that in contrast to patients with dementia praecox, there was a subset of patients who held delusional beliefs but did not manifest hallucinations. Furthermore, functional capacities were generally preserved and the downhill course he saw as central to the dementia praecox diagnosis was not show...

Delusional disorder, once termed paranoia, was an important diagnosis in the late nineteenth and early twentieth centuries. Subsequently it was subsumed with schizophrenia, and only in 1987 was it reintroduced into modern psychiatric diagnosis. This book aims to reconcile recent knowledge with older ideas about the condition, and thereby to provide a contemporary perspective to the concept of d...

With regard to delusional disorder-somatic subtype there may be a relationship with body dysmorphic disorder. There are reports that some delusional disorders can evolve to become schizophrenia. Similarly, the treatment of such disorders with antipsychotics has been documented. This report describes a case of delusional disorder - somatic type - preceding a psychotic episode and its successful ...

Background. Most of the existing studies suggest that suicide is one of the leading causes of premature death in patients with chronic psychotic disorders. However, very few studies have specifically investigated suicidal behaviour in patients with delusional disorder. Thus, our objective was to review the literature regarding the percentage of lifetime ideation and suicidal behaviour in delusi...

INTRODUCTION Folie à deux or induced delusional disorder is a rare mental disorder. It was initially described by the French Lasègue and Falret in 1877. Two subjects, who live in a close relationship, in isolation, share delusional ideas based on the same themes. Various classifications exist. Its epidemiology remains unclear, because most of the data have been extrapolated from case reports. ...

OBJECTIVE Delusional disorder has been traditionally considered a psychotic syndrome that does not evolve to cognitive deterioration. However, to date, very little empirical research has been done to explore cognitive executive components and memory processes in Delusional Disorder patients. This study will investigate whether patients with delusional disorder are intact in both executive funct...