Incomplete hippocampal inversion and epilepsy: A systematic review and meta-analysis.

OBJECTIVE: Incomplete hippocampal inversion (IHI) is a relatively frequent radiological finding at visual inspection in both epilepsy and healthy controls, but its clinical significance is unclear. Here, we systematically retrieve and assess the association between epilepsy and IHI using a meta-analytic approach. Additionally, we estimate the prevalence of IHI in patients with malformation of cortical development (MCD). METHODS: We systematically searched two databases (Embase and PubMed) to identify potentially eligible studies from their inception to December 2019. For inclusion, studies were population-based, case-control, observational studies reporting on epilepsy and IHI. The risk of developing epilepsy in IHI (estimated with odds ratio [ORs]) and the frequency of IHI among patients with MCD are provided. RESULTS: We screened 3601 records and assessed eligibility of 2812 full-text articles. The final material included 13 studies involving 1630 subjects. Seven studies (1329 subjects: 952 epileptic and 377 nonepileptic) were included for the estimation of the risk of developing epilepsy in the presence of IHI. The estimated OR of active epilepsy in IHI was 1.699 (95% confidence interval = 0.880-3.281), with moderate heterogeneity across studies (I2  = 71%). Seven studies (591 patients) provided information about the frequency of IHI in MCD. Up to one third of patients with MCD (27.9%) presented coexistent IHI. SIGNIFICANCE: The present findings confirm that IHI is commonly observed in patients with MCD especially in periventricular nodular heterotopia or polymicrogyria. However, the estimated OR indicates overall weak increased odds of epilepsy in people with IHI, suggesting that the presence of isolated IHI cannot be considered a strong independent predictor for epilepsy development. Clear-cut neuroradiological criteria for IHI and advanced postprocessing analyses on structural magnetic resonance imaging scans are recommended to highlight differences between epileptogenic and nonepileptogenic IHI.

Herpes Simplex Virus 1 encephalitis with normal cerebrospinal fluid after brain radiotherapy in a patient with glioblastoma. A case report and review of literature.

Herpes simplex virus encephalitis (HSE) is the most common cause of letal encephalitis and its prevalence appears higher among oncologic patients who undergo brain radiotherapy (RT). We describe a case of 76-year-old woman with glioblastoma multiforme (GBM) who developed HSE shortly after brain RT. Cerebrospinal fluid analysis (CSF) was normal and the diagnosis was driven by brain MRI and EEG. Prompt introduction of antiviral therapy improved the clinical picture. We highlight the importance of EEG and brain MRI for the diagnosis and suggest the possibility of antiviral profilaxys in oncologic patients who undergo brain RT.

Myocardial infarction following convulsive and nonconvulsive seizures.

UNLABELLED: Myocardial infarction (MI) has been rarely reported in association with seizures, and only of convulsive type. METHODS: We describe a series of five patients observed over a 4-year period, who presented MI immediately following seizures, either convulsive or nonconvulsive. RESULTS: Patient 1 had pre-existent coronary disease (CD) and presented multiple focal nonconvulsive seizures. Patient 2 had no CD, normal coronary angiography and presented secondary generalized convulsive seizures. Patient 3 had no history of CD, normal angiography and had a first single convulsive seizure. Patient 4 had severe CD and suffered from a single convulsive event. Patient 5 had a partial and a generalized seizure and had no known CD. CONCLUSIONS: MI following seizures is not an exceptional event and can occur in a spectrum of conditions including single or repeated, convulsive or nonconvulsive seizures, in patients with or without pre-existing coronary disease. We suggest that the occurrence of MI should be considered in epileptic patients during and shortly after seizures.

Depression, hopelessness and suicide risk among patients suffering from epilepsy.

Suicide risk, as well as psychiatric disorder, has been repeatedly reported in the international literature as an important issue in the care of individuals suffering from epilepsy. In this pilot study a sample comprising 103 patients with a diagnosis of temporal lobe epilepsy, were collected from three clinics. The patients were administered the Beck hopelessness scale (BHS), the Beck depression inventory (BDI) and the Zung self-rating anxiety scale (SAS). Hopelessness has been identified as a construct linked to the prediction and the prevention of suicide. Twenty-six percent of the epileptic patients had scores>or=9 on the BHS, suggesting that they should be evaluated for suicidal inclinations. These patients were significantly older by about 9 years and had higher levels of depression and anxiety, but they did not differ in sex, age of onset of epilepsy or in their responsiveness to medication. In the logistic regression analysis, a hopelessness score>or=9 was predicted by BDI depression scores and SAS anxiety scores taking into account sex, age and response to epileptic medications. Despite a number of limitations, this pilot study adds support for the need for screening for suicide risk in patients with epilepsy. Both clinical and psychometric data should be part of the evaluation of the epileptic patient for psychiatric and suicidality assessment.