Acute measles encephalitis is a pathology of the central nervous system. It is most frequent in children but can also be described in adults. Given the rarity of this pathology, we present the case of this patient.

present a rare neuropsychiatric complication of measles

Présentation d’un cas clinique d’encéphalite rougeoleuse et revue de la littérature

Mrs. HJ, 45 years old, without any somatic history, was followed for an antisocial personality with a substance use disorder. She consulted the emergency for psychomotor agitation, a fever of 39, and a rash on the face, thorax, and limbs. At the psychiatric interview, she was disoriented and very unstable. She seemed to be hallucinating.

The brain imaging and the lumbar puncture (CT scan and brain MRI) were without abnormality. The rapid test (HIV) was negative and the biological check-up showed a hyperleukocytosis at 12660 and a crp at 138. The patient was put on double antibiotic therapy.

The evolution was marked by the non-improvement of the symptomatology with the persistence of agitation. Her speech was almost absent with a refusal to answer and to execute orders. She maintained certain postures. The patient was put on 400 mg of amisulpride.

After recovery of the viral serology, the diagnosis of a measles encephalopathy was confirmed (IgM positive) and the patient improved after a few days of hospitalization and was addressed to the psychiatric outpatient clinic.

Measles encephalitis is a rare but serious complication that requires multidisciplinary management

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Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is an autoimmune disorder characterized by neuropsychiatric symptoms before progressing to seizures, complex movement disorder, autonomic dysfunction and hypoventilation.

Presenting a review of the psychiatric manifestations of anti-NMDAR encephalitis.

Search on Pubmed® and Medscape® databases with the following keywords: “psychiatric”, “anti-NMDA receptor encephalitis” and “anti-NMDAR encephalitis”. We focused on data from systematic reviews and meta-analyzes. The articles were selected by the authors according to their relevance.

Studies show that 77% to 95% of patients with anti-NMDAR encephalitis initially present psychiatric manifestations. Age and sex distribution are young women, and the frequency of cases is lower after 40 years of age. The most common psychiatric symptoms are agitation (59%) and psychotic symptoms (54%). The psychotic symptoms more common are visual (64%), auditory (59%) hallucinations and persecutory delusions (73%). Catatonia is described in 42% of patients. Antipsychotic treatment induces an adverse drug reaction (33%), the neuroleptic malignant syndrome represents 22% of the cases. Delays in distinguishing this disease from a psychiatric disorder can have serious complications, with a mortality of up to 25% in patients receiving limited or delayed immunotherapy.

It’s important to consider anti-NMDAR encephalitis in the differential diagnosis of patients with an acute onset psychosis or unusual psychiatric symptoms. Antipsychotic treatment should be use with caution when suspected or confirmed anti-NMDAR encephalitis. Without appropriate treatment, patients may suffer a protracted course with significant long-term disability or death. A clinical index of suspicion is required to identify patients who would benefit from cerebrospinal fluid testing and immunotherapies.

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Autoimmune encephalitis (AE) refers to a newly described, heterogeneous group of rare diseases characterized by brain inflammation and circulating autoantibodies. Various AE have been described and each of them is linked to the presence of specific autoantibodies directed against synaptic and neuronal cell surface antigens. The clinical picture includes a wide array of neuropsychiatric symptoms and is correlated with the associated antibody subtype. Since pronounced psychiatric symptoms are relatively common at the onset, patients can be misdiagnosed and initially driven to psychiatric institutions, thus delaying the adequate diagnosis and management of AE.

We aim to review and summarize the psychiatric manifestations of AE that might dominate the clinical picture. We also aim to describe the clinical signs that should alert the psychiatrist to the possibility of these diagnoses.

We performed an updated review in the PubMed database using the terms “autoimmune”, “encephalitis” and “psychiatric manifestations”. The included articles were selected by title and abstract. We also consulted a reference textbook.

We summarize the reported psychiatric manifestations of AE and also include two situations that can be helpful in AE diagnosis in the psychiatric setting: symptoms that should alert the physician for the possibility of AE and symptoms that should prompt an antibody detection test.

AE are rare diseases that present very frequently with psychiatric symptoms as the first manifestation. Psychiatrists need to be aware of the most common psychiatric manifestations of AE since the early recognition and treatment of AE is fundamental for a good outcome.