Catatonia, described by Kahlbaum in 1874, is usually seen as a type of schizophrenia, but it can also occur in a wide range of other psychiatric/organic disturbances. There is a documented association between dementia and catatonia, in all phases of cognitive impairment.

Literature review and discussion about Catatonia, regarding a case report.

Clinical interviews and literature review in PUBMED database.

Female patient, 89 years old, without psychiatric history, was diagnosed with dementia 5 months prior to episode. On admission, she presents with prostration, mutism and refusal to eat/drink. Laboratory studies were normal and TC-CE shows signs of an old stroke in left temporo-parietal region and diffuse signs of ischemic leucoencephalopathy. At psychiatric evaluation, she was stuporous, unreactive to pain, mute, not following verbal commands, keeping her eyes closed and resisting attempts to open her eyelids. She had global rigidity, axial and limbs, and maintains the postures the examiner puts her into for long periods. She was already given chlorpromazine, without improvement. Then she takes diazepam 10 mg iv, with remission of the state.

Although catatonia usually presents with drama, clinicians often forget to consider it in differential diagnosis, probably because of its traditional association with schizophrenia. A promptly diagnostic is crucial to provide adequate treatment, avoiding drugs that can worsen/perpetuate the clinical state. Some authors even support the idea that motor features associated with end-line dementias may correspond to lorazepam-responsive catatonia, in which treatment may have a tremendous impact worldwide.

The authors have not supplied their declaration of competing interest.