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Frontotemporal dementia — Clinical Guidelines

Overview

Frontotemporal dementia (FTD) is a heterogeneous group of neurodegenerative disorders primarily affecting individuals under 65 years, characterized by behavioral, language, and executive dysfunction 2.

Diagnosis

Clinical Assessment: Essential for diagnosis, often challenging to distinguish from Alzheimer's disease (AD) and other dementias 1.

Brain Perfusion SPECT: Limited diagnostic value; sensitivity 56%-88%, specificity 51%-93% for FTD vs. AD; improves accuracy when combined with clinical data 1.

Neurofilament Light Chain (NfL): Shows potential as a biomarker for differentiating FTD from healthy controls, AD, and psychiatric disorders; higher levels in specific FTD subtypes like semantic dementia 3.

Management

No Specific Drug Treatments: Currently, no FDA-approved medications specifically target FTD symptoms 1 2.

Supportive Care: Focus on managing behavioral symptoms, cognitive decline, and maintaining quality of life 2.

Genetic Counseling: Recommended for families with hereditary forms, particularly those with VCP mutations 7.

Special Populations

Hereditary Forms: VCP mutations present with high penetrance for FTD (100% in one family, 70% in another) alongside variable features like Paget disease of bone 7.

Key Recommendations

Combine Clinical Assessment with Brain Perfusion SPECT for Challenging Diagnoses: When clinical differentiation is difficult, SPECT can be considered to enhance diagnostic accuracy (Evidence: Moderate 1).

Utilize Neurofilament Light Chain (NfL) Biomarkers for Differentiation: NfL levels can aid in distinguishing FTD from other dementias and psychiatric disorders (Evidence: Moderate 3).

Consider Genetic Testing and Counseling in Suspected Hereditary Cases: Especially for families with a history of VCP mutations, to guide prognosis and management (Evidence: Expert opinion 7).

References

1 Athanasio BS, Oliveira ACS, Pedrosa AL, Borges RS, Neto AOM, Oliveira RA et al.. The role of brain perfusion SPECT in the diagnosis of frontotemporal dementia: A systematic review. Journal of neuroimaging : official journal of the American Society of Neuroimaging 2024. link 2 Bandopadhyay R, Gatt A, Lashley T. Advances in the Understanding of Frontotemporal Dementia. Cells 2023. link 3 Karantali E, Kazis D, Chatzikonstantinou S, Petridis F, Mavroudis I. The role of neurofilament light chain in frontotemporal dementia: a meta-analysis. Aging clinical and experimental research 2021. link 4 Morris JK. Immunity at the forefront of the brain: A new genetic model of FTD. Science translational medicine 2017. link 5 Schönbach C, Horton P, Yiu SM, Tan TW, Ranganathan S. GIW and InCoB, two premier bioinformatics conferences in Asia with a combined 40 years of history. BMC genomics 2015. link 6 Pijnenburg YA. The roots of social inappropriateness in frontotemporal dementia. Journal of neurology, neurosurgery, and psychiatry 2007. link 7 Guyant-Maréchal L, Laquerrière A, Duyckaerts C, Dumanchin C, Bou J, Dugny F et al.. Valosin-containing protein gene mutations: clinical and neuropathologic features. Neurology 2006. link 8 Pleasure SJ, Selzer ME, Lee VM. Lamprey neurofilaments combine in one subunit the features of each mammalian NF triplet protein but are highly phosphorylated only in large axons. The Journal of neuroscience : the official journal of the Society for Neuroscience 1989. link

Frontotemporal dementia