Usefulness of Brain Positron Emission Tomography with Different Tracers in the Evaluation of Patients with Idiopathic Normal Pressure Hydrocephalous

Idiopathic normal pressure hydrocephalus (iNPH) is the only form of dementia that can be cured by surgery. Its diagnosis relies on clinical and radiological criteria. Identifying patients who can benefit from surgery is challenging, as other neurological diseases can be concomitant or mimic iNPH. We...

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Veröffentlicht in:International journal of molecular sciences 2020-09, Vol.21 (18), p.6523
Hauptverfasser: Mattoli, Maria Vittoria, Treglia, Giorgio, Calcagni, Maria Lucia, Mangiola, Annunziato, Anile, Carmelo, Trevisi, Gianluca
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container_title International journal of molecular sciences
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creator Mattoli, Maria Vittoria
Treglia, Giorgio
Calcagni, Maria Lucia
Mangiola, Annunziato
Anile, Carmelo
Trevisi, Gianluca
description Idiopathic normal pressure hydrocephalus (iNPH) is the only form of dementia that can be cured by surgery. Its diagnosis relies on clinical and radiological criteria. Identifying patients who can benefit from surgery is challenging, as other neurological diseases can be concomitant or mimic iNPH. We performed a systematic review on the role of positron emission tomography (PET) in iNPH. We retrieved 35 papers evaluating four main functional aspects with different PET radiotracers: (1) PET with amyloid tracers, revealing Alzheimer's disease (AD) pathology in 20-57% of suspected iNPH patients, could be useful in predictions of surgical outcome. (2) PET with radiolabeled water as perfusion tracer showed a global decreased cerebral blood flow (CBF) and regional reduction of CBF in basal ganglia in iNPH; preoperative perfusion parameters could predict surgical outcome. (3) PET with 2-Deoxy-2-[ F]fluoroglucose ([ F]FDG ) showed a global reduction of glucose metabolism without a specific cortical pattern and a hypometabolism in basal ganglia; [ F]FDG PET may identify a coexisting neurodegenerative disease, helping in patient selection for surgery; postsurgery increase in glucose metabolism was associated with clinical improvement. (4) Dopaminergic PET imaging showed a postsynaptic D2 receptor reduction and striatal upregulation of D2 receptor after treatment, associated with clinical improvement. Overall, PET imaging could be a useful tool in iNPH diagnoses and treatment response.
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Its diagnosis relies on clinical and radiological criteria. Identifying patients who can benefit from surgery is challenging, as other neurological diseases can be concomitant or mimic iNPH. We performed a systematic review on the role of positron emission tomography (PET) in iNPH. We retrieved 35 papers evaluating four main functional aspects with different PET radiotracers: (1) PET with amyloid tracers, revealing Alzheimer's disease (AD) pathology in 20-57% of suspected iNPH patients, could be useful in predictions of surgical outcome. (2) PET with radiolabeled water as perfusion tracer showed a global decreased cerebral blood flow (CBF) and regional reduction of CBF in basal ganglia in iNPH; preoperative perfusion parameters could predict surgical outcome. (3) PET with 2-Deoxy-2-[ F]fluoroglucose ([ F]FDG ) showed a global reduction of glucose metabolism without a specific cortical pattern and a hypometabolism in basal ganglia; [ F]FDG PET may identify a coexisting neurodegenerative disease, helping in patient selection for surgery; postsurgery increase in glucose metabolism was associated with clinical improvement. (4) Dopaminergic PET imaging showed a postsynaptic D2 receptor reduction and striatal upregulation of D2 receptor after treatment, associated with clinical improvement. 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(3) PET with 2-Deoxy-2-[ F]fluoroglucose ([ F]FDG ) showed a global reduction of glucose metabolism without a specific cortical pattern and a hypometabolism in basal ganglia; [ F]FDG PET may identify a coexisting neurodegenerative disease, helping in patient selection for surgery; postsurgery increase in glucose metabolism was associated with clinical improvement. (4) Dopaminergic PET imaging showed a postsynaptic D2 receptor reduction and striatal upregulation of D2 receptor after treatment, associated with clinical improvement. 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source MDPI - Multidisciplinary Digital Publishing Institute; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central
subjects Alzheimer Disease - metabolism
Alzheimer's disease
Amyloid
Amyloid - metabolism
Amyloidogenic Proteins - metabolism
Basal ganglia
Biopsy
Blood flow
Brain - diagnostic imaging
Cerebral blood flow
Cerebrovascular Circulation - physiology
Clinical medicine
Cognitive ability
Dementia
Dementia disorders
Dopamine D2 receptors
Emission analysis
Fluorine isotopes
Fluorodeoxyglucose F18
Glucose
Glucose metabolism
Health services
Humans
Hydrocephalus
Hydrocephalus, Normal Pressure - diagnostic imaging
Hypometabolism
Medical imaging
Metabolism
Neostriatum
Neurodegenerative Diseases - diagnostic imaging
Neurodegenerative Diseases - metabolism
Neuroimaging
Neurological diseases
Pathology
Pathophysiology
Patients
Perfusion
Positron emission
Positron emission tomography
Positron-Emission Tomography - methods
Proteins
Radioactive tracers
Review
Surgery
Systematic review
tau Proteins - metabolism
Tomography
Ventriculoperitoneal Shunt - trends
title Usefulness of Brain Positron Emission Tomography with Different Tracers in the Evaluation of Patients with Idiopathic Normal Pressure Hydrocephalous
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