title: First-episode 'coenesthetic' schizophrenia presenting with alien hand syndrome and partial agenesis of the corpus callosum.
abstract: We describe the case of a 23-year-old Caucasian woman who presented with alien hand syndrome and a first episode of the coenesthetic subtype of schizophrenia. 'Alienness' of her non-dominant hand was intimately phenomenologically associated with the onset of first-psychosis. Cerebral MRI revealed a partial agenesis of the corpus callosum with a complete absence of the rostrum, hypoplastic anterior and inferior genu, and a hypoplastic splenium. This case suggests that this syndrome can occur with the development of a functional disconnection syndrome involving the anterior callosum, and in this case the 'second hit' proposed to occur in early adulthood in schizophrenia may have interacted with her earlier neurodevelopmental lesion to result in a combination of psychosis and alien hand syndrome.
authors.affiliation: Specialised Outpatient Clinic for Early Psychosis, Psychiatric Outpatient Services Bruderholz, Bruderholz, Switzerland. andor.simon@bluewin.ch
authors.forename: Andor
authors.initials: A
authors.lastname: Simon
authors.forename: Mark
authors.initials: M
authors.lastname: Walterfang
authors.forename: Carlo
authors.initials: C
authors.lastname: Petralli
authors.forename: Dennis
authors.initials: D
authors.lastname: Velakoulis
mesh_terms: D001072:Apraxias; D003337:Corpus Callosum / Q000473:pathology*; D005260:Female; D006225:Hand; D006801:Humans; D008279:Magnetic Resonance Imaging; D012559:Schizophrenia / Q000473:pathology* / Q000503:physiopathology*; D013577:Syndrome; D055815:Young Adult