The Usefulness of 18 F-FDG PET to Differentiate Subtypes of Dementia:The Systematic Review and Meta-Analysis

Background@#and Purpose: Dementia subtypes, including Alzheimer’s dementia (AD), dementia with Lewy bodies (DLB), and frontotemporal dementia (FTD), pose diagnostic challenges. This review examines the effectiveness of 18 F-Fluorodeoxyglucose Positron Emission Tomography ( 18 F-FDG PET) in differentiating these subtypes for precise treatment and management. @*Methods@#A systematic review following Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines was conducted using databases like PubMed and Embase to identify studies on the diagnostic utility of 18 F-FDG PET in dementia. The search included studies up to November 16, 2022, focusing on peer-reviewed journals and applying the goldstandard clinical diagnosis for dementia subtypes. @*Results@#From 12,815 articles, 14 were selected for final analysis. For AD versus FTD, the sensitivity was 0.96 (95% confidence interval [CI], 0.88–0.98) and specificity was 0.84 (95% CI, 0.70–0.92). In the case of AD versus DLB, 18F-FDG PET showed a sensitivity of 0.93 (95% CI 0.88-0.98) and specificity of 0.92 (95% CI, 0.70–0.92). Lastly, when differentiating AD from non-AD dementias, the sensitivity was 0.86 (95% CI, 0.80–0.91) and the specificity was 0.88 (95% CI, 0.80–0.91). The studies mostly used case-control designs with visual and quantitative assessments. @*Conclusions@#18 F-FDG PET exhibits high sensitivity and specificity in differentiating dementia subtypes, particularly AD, FTD, and DLB. This method, while not a standalone diagnostic tool, significantly enhances diagnostic accuracy in uncertain cases, complementing clinical assessments and structural imaging.

Clinical Practice Guideline for Dementia (Diagnosis and Evaluation):2021 Revised Edition

no abstract available.

Successful Treatment of Intractable Hiccup with Levetiracetam

Hiccups may be considered a form of myoclonus of diaphragm. Valproic acid has been considered the drug of choice in treatment of intractable hiccups; however, its various adverse events limit its use in the clinical basis, especially in elderly or complicated patients. Levetiracetam was known as a safe antiepileptic drug. However, the anti-hiccup property of the levetiracetam has been rarely reported. We report a 69-year old male patient who developed sudden persistent hiccups and was successfully treated with levetiracetam. Levetiracetam should be considered as alternative treatment option in selected patients with intractable hiccups.

Validity and Reliability of a Korean Version of the National Institutes of Health Stroke Scale

BACKGROUND AND PURPOSE: The National Institutes of Health Stroke Scale (NIHSS) is a clinical assessment tool that is widely used in clinical trials and practice to evaluate stroke-related neurological deficits. The aim of this study was to determine the validity and reliability of the Korean version of the NIHSS (K-NIHSS) for evaluating Korean stroke patients. METHODS: The K-NIHSS was translated and adapted with regard to cultural and linguistic peculiarities. To examine its content validity, we quantified the Content Validity Index (CVI), which was rated by 11 stroke experts. The validity of the K-NIHSS was assessed by comparison with the Glasgow Coma Scale (GCS), the modified Rankin Scale (mRS), and the Barthel Index. The reliability of the K-NIHSS was evaluated using the unweighted kappa statistics for multiple raters and an intraclass correlation coefficient (ICC). RESULTS: The CVI of the K-NIHSS reached 0.91-1.00. The median K-NIHSS score at baseline was 3 (interquartile range, 2-7), and the mean+/-SD score was 6.0+/-6.6. The baseline K-NIHSS had a significantly negative correlation with the GCS at baseline and the Barthel Index after 90 days. The K-NIHSS also had a significantly positive correlation with the mRS after 90 days. Facial paresis and dysarthria had moderate interrater reliability (unweighted kappa, 0.41-0.60); kappa values were substantial to excellent (unweighted kappa, >0.60) for all the other items. The ICC for the overall K-NIHSS score was 0.998. The intrarater reliability was acceptable, with a median kappa range of 0.524-1.000. CONCLUSIONS: The K-NIHSS is a valid and reliable tool for assessing neurological deficits in Korean acute stroke patients.

Successful Treatment of Intractable Hiccup with Levetiracetam / 대한간질학회지

Hiccups may be considered a form of myoclonus of diaphragm. Valproic acid has been considered the drug of choice in treatment of intractable hiccups; however, its various adverse events limit its use in the clinical basis, especially in elderly or complicated patients. Levetiracetam was known as a safe antiepileptic drug. However, the anti-hiccup property of the levetiracetam has been rarely reported. We report a 69-year old male patient who developed sudden persistent hiccups and was successfully treated with levetiracetam. Levetiracetam should be considered as alternative treatment option in selected patients with intractable hiccups.

Clinical Characteristics of Acute Ischemic Stroke while Sleep and Awake / 대한뇌졸중학회지

BACKGROUND: Ischemic stroke occurring during sleep is still an unexplored area of cerebrovascular event. As the exact onset time of stroke while sleeping (SWS) cannot be determined, these patients are generally excluded from the thrombolytic therapy of acute ischemic stroke. The aim of this study was to know whether differences in clinical features exist between patients suffering a SWS and those with stroke while awake (SWA). METHODS: We reviewed the medical records of acute ischemic stroke patients consecutively registered in Hallym Stroke Databank between January 1999 and June 2007. We compared the risk factors and clinical features between the SWS and SWA groups. RESULTS: A total of 2,962 patients were included in the study, of which 821 (27.7%) were SWS. No differences between SWS and SWA were identified with regard to baseline clinical characteristics and risk factors except a history of smoking. In stroke subtype, small vessel occlusions were more frequently in SWS group than SWA group. Intravenous rt-PA treatments were performed frequently in the SWA group. Clinical outcomes at discharge were better in SWA group than SWS group. CONCLUSION: This study suggest that no major differences were exist in clinical characteristics between SWS and SWA patients, except the history of smoking. Clinical outcomes of patients with ischemic stroke within 6 hours after stroke onset were poor in SWS group. In SWS group, relatively little chances of thrombolysis might be the explanation of these finding.

Clinical practice guideline for dementia by Clinical Research Center for Dementia of South Korea

The Clinical Research Center for Dementia of South Korea (CREDOS), a nation-wide clinical dementia research group, has prepared clinical practice guidelines (CPG) for dementia tailored to the Korean population. In this article, a summary of the CREDOS CPG is presented with the Korean and English version of full report included in the appendix. The CREDOS CPG in intended not only for psychiatrists and neurologists, but also internists, family physicians, and other primary care physicians involved in the prevention and early diagnosis of dementia. While our CPG for dementia mainly covers Alzheimer's disease (AD) and vascular dementia (VaD), it also includes mild cognitive impairment (MCI) and vascular MCI, which are currently known to be the preclinical stages of AD or VaD, respectively, with emphasis placed on early diagnosis. The CREDOS CPG aims to achieve the following goals by developing CPG for dementia: to establish evidence-based, objective and clear clinical standards for dementia; to improve the clinical decision-making process for patients with dementia; to provide scientific and systematic scales to aid in the work of dementia specialists; to suggest comprehensive and systematic healthcare services tailored to each dementia subtype. The CREDOS CPG focuses on diagnosis and evaluation of clinical practice available domestically, and provides useful concepts of dementia. Its emphasis is on etiologies and epidemiology, diagnostic criteria and evaluation, neuropsychological tests, behavioral and psychological symptoms, the activities of daily living, laboratory tests, and brain imaging.

Diagnosis of Dementia: Neuropsychological Test / 가정의학회지

Dementia is the syndrome declined the human cognitive function, especially the memory. It is important that each subdomain of cognition must be evaluated in the diagnosis of dementia. The neuropsychological test is needed for proper evaluation of the cognitive state of patients suspected dementia. Because many neuropsychological (NP) tests have been developed and validated in Korea, we have to understand the characteristics and the pros and cons of each test. Clinical Practical Guideline (CPG) for dementia has been developed by clinical research center for dementia since 2007 and NP tests that have been used and validated frequently in Korea was presented in this CPG. As elderly population increases, the more patients have been diagnosed as dementia. Therefore, the primary physician examining and diagnosing the dementia patients have to understand the NP test fundamentally.

Predictive Factors for the Relapse of Seizure after Withdrawal from the Monotherapy of the Antiepileptic Drug in Cryptogenic Partial Epilepsy / 대한간질학회지

PURPOSE: There is no apparent consensus about the successful policy of antiepileptic drug (AED) withdrawal, nor about definite factors to make patients remain seizure-free. We attempted to find out the predictive factors for seizure relapse after withdrawal of AED in patients with cryptogenic partial epilepsy. METHODS: This is a case-controlled and hospital-based observational study. A total of 91 crytogenic partial epileptic patients in whom seizure had been successfully controlled by AED monotherapy for more than two years were subjected to drug withdrawal. Patients with history of febrile convulsion, status epilepticus, and abnormal intelligence were excluded. Subjects were divided into two groups; the first group consisted of patients with seizure free more than 2 years after withdrawal of AED and another group with seizure recurrence during tapering or after drug withdrawal. The group with successful withdrawal had 48 patients, and, in 43 patients, seizure was recurred. Clinical profiles were compared between the two groups. RESULTS: There was no significant difference in gender, family history, age at onset, number of seizure attacks before AED initiation, duration of illness before treatment, and seizure or epilepsy classifications between the two groups. However, an abnormal EEG finding was associated with seizure relapse (Chi-square test p<0.05). On the other hand, the number of seizure attacks and the interval between the AED initiation and the time when a seizure free period was achieved had a correlation with seizure relapse, but was not statistically significant. CONCLUSIONS: Abnormal EEG findings was the predictive factor for seizure relapse after withdrawal from AED monotherapy in cryptogenic partial epilepsy.

Concomitant Absence and Occipital Lobe Epilepsy in an Adolescent

The incidence of absence and occipital lobe epilepsy appearing in the same young individual is quite rare. A fourteen year-old girl has had two types of recurrent seizures: 1)simple partial seizure with secondary generalization probably originating in the left occipital lobe, and 2)absence seizure. Electroencephalogram demonstrated frequent spikes on the left occipital region with or without bilateral synchronization and generalized 3 Hz spike and wave complexes during hyperventilation procedure and photic stimulation.

Rhino-orbito-cerebral Mucormycosis Complicated with Intracranial Hemorrhage

Rhino-orbito-cerebral mucormycosis is an uncommon fulminant fungal infection that occurs usually in debilitated or immune suppressed patients. Intracranial lesions such as cerebral ischemia mostly develop secondary to vascular injuries like thrombosis of cavernous sinus or internal carotid artery and also from arteritis. However, intracranial hemorrhage complicated by mucormycosis is very rare. We report a patient with a fatal complicaton of intracranial hemorrhage presumably due to arteritis by mucormycosis. A 66-year-old female patient with uncontrolled diabetes mellitus developed complete ophthalmoplegia in her left eye for two days. Rhinoscopic examination revealed black necrotic turbinate. Orbital CT scan and Brain MRI showed soft tissue material at the left orbital apex and mild deformities in the left lateral cavernous sinus. On the basis of radiological evidence and biopsy, a diagnosis of mucormycosis was established, and the patient underwent surgical debridement followed by an Amphotericin B infusion. On the following day, she suddenly developed a right hemiparesis and stupor. An immediate brain CT scan revealed a large intracranial hemorrhage in the left frontal head region. Removal of the hematoma and a biopsy was performed immediately. A pathological examination revealed a fungal invasion of the small arterial wall and an acute inflammatory reaction of the surounding tissues.

Transient Global Amnesia Due to Hippocampal Infarction

Transient global amnesia(TGA) is not a rare event in the elderly, which is characterized by transient inability to form the new memory traces plus retrograde amnesia with benign prognosis. The etiology is unknown, but suggested causes have included transient ischemic attack, migraine, epilepsy, brain tumor, drug intoxication, other toxic/metabolic disturbances, or hysteria. Especially, TGA associated with ischemic stroke is important on the elderly patients and necessary to be differentiated with other causes, for stroke prevention. As far as we know, the case of TGA due to cerebral infarction confirmed by brain imaging study is extremely rare in the literature. We report the case of 67 year-old female patient with typical TGA showing ischemic lesion on the right temporal area on MRI and discussed its significance as one of the cause of TGA.