Article Text

Obstructive hydrocephalus caused by colloid cyst presenting as a schizophrenia-like psychosis
  1. Mikkel Højlund1,
  2. Pia Hansen1,
  3. Willy Krone2,
  4. Lene Høgh1
  1. 1 Department of Psychiatry Aabenraa, Mental Health Services Region of Southern Denmark, Aabenraa, Denmark
  2. 2 Department of Clinical Radiology, Odense University Hospital, Odense, Denmark
  1. Correspondence to Mikkel Højlund, tallgrove{at}


This report presents a young woman with psychotic symptoms that were highly suspicious of schizophrenia. Previous attempts of antidepressant therapy of mood symptoms had been ineffective. However, she also presented with discrete signs of an underlying neurological condition, and as a part of the diagnostic workup, neuroimaging revealed ventriculomegaly. She was diagnosed with obstructive hydrocephalus and experienced full remission of psychotic symptoms after neurosurgical intervention with a ventriculoperitoneal shunt. This atypical presentation of obstructive hydrocephalus underlines the importance of neuroimaging in psychiatric differential diagnostics. Otherwise, this young woman had been diagnosed with schizophrenia, instead of organic delusional disorder secondary to a neurological condition, with possible irreversible damage to brain tissue as a consequence.

  • psychiatry
  • psychotic disorders (incl schizophrenia)
  • hydrocephalus
  • neuroimaging

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  • Contributors MH has drafted the manuscript. PH has conducted the psychopathological interview. WK has produced the images and other radiological details and LH was responsible for the psychopharmacological treatment. All authors are responsible for the critical revision of the manuscript and its intellectual content.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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