Right temporal variant frontotemporal dementia initially presenting with gradually progressing heading disorientation: A case report.

: Previous studies of topographical disorientation have focused on cerebrovascular diseases. However, a detailed assessment of patients with neurodegenerative diseases may aid our understanding of spatial navigation. We report the case of a patient with right temporal variant frontotemporal dementia (rtvFTD) initially presenting with heading disorientation, a distinct category of topographical disorientation.

Dynamic aphasia as an early sign of corticobasal degeneration: Clinico-radio-pathological correlation.

A 72-year-old man presented with a 6-month history of decreased voluntary speech. Sparse speech and decreased word fluency were observed. Articulation, naming, comprehension, and repetition were preserved.

High sensitivity of asymmetric F-THK5351 PET abnormality in patients with corticobasal syndrome.

Corticobasal syndrome (CBS) is characterized by symptoms related to the asymmetric involvement of the cerebral cortex and basal ganglia. However, early detection of asymmetric imaging abnormalities can be challenging. Previous studies reported asymmetric F-THK5351 PET abnormalities in CBS patients, but the sensitivity for detecting such abnormalities in larger patient samples, including early-stage cases, remains unclear.

CSF P-Tau181 and Other Biomarkers in Patients With Neuronal Intranuclear Inclusion Disease.

Background And Objectives: CSF tau phosphorylated at threonine 181 (p-tau181) is a widely used biomarker for Alzheimer disease (AD) and has recently been regarded to reflect β-amyloid and/or p-tau deposition in the AD brain. Neuronal intranuclear inclusion disease (NIID) is a neurodegenerative disease characterized by intranuclear inclusions in neurons, glial cells, and other somatic cells. Symptoms include dementia, neuropathy, and others.

Diffusion-Weighted Imaging is Key to Diagnosing Specific Diseases.

This article reviews diseases for which persistent signal abnormalities on diffusion-weighted imaging are the key to their diagnosis. Specifically, updated knowledge regarding the neuroimaging patterns of the following diseases is summarized: sporadic Creutzfeldt-Jakob disease, neuronal intranuclear inclusion disease, and hereditary diffuse leukoencephalopathy with axonal spheroids-colony-stimulating factor receptors/adult-onset leukoencephalopathy with axonal spheroids and pigmented glia. In addition, their differential diagnoses; clinical manifestations; and pathologic, genetic, and imaging correlates are discussed.