Incremental value of amyloid-PET versus CSF in the diagnosis of Alzheimer's disease.

Abstract:

PURPOSE:To compare the incremental diagnostic value of amyloid-PET and CSF (Aβ42, tau, and phospho-tau) in AD diagnosis in patients with mild cognitive impairment (MCI) or mild dementia, in order to improve the definition of diagnostic algorithm. METHODS:Two independent dementia experts provided etiological diagnosis and relative diagnostic confidence in 71 patients on 3 rounds, based on (1) clinical, neuropsychological, and structural MRI information alone; (2) adding one biomarker (CSF amyloid and tau levels or amyloid-PET with a balanced randomized design); and (3) adding the other biomarker. RESULTS:Among patients with a pre-biomarker diagnosis of AD, negative PET induced significantly more diagnostic changes than amyloid-negative CSF at both rounds 2 (CSF 67%, PET 100%, P = 0.028) and 3 (CSF 0%; PET 78%, P < 0.001); PET induced a diagnostic confidence increase significantly higher than CSF on both rounds 2 and 3. CONCLUSIONS:Amyloid-PET should be prioritized over CSF biomarkers in the diagnostic workup of patients investigated for suspected AD, as it provides greater changes in diagnosis and diagnostic confidence. TRIAL REGISTRATION:EudraCT no.: 2014-005389-31.

authors

Ramusino MC,Garibotto V,Bacchin R,Altomare D,Dodich A,Assal F,Mendes A,Costa A,Tinazzi M,Morbelli SD,Bauckneht M,Picco A,Dottorini ME,Tranfaglia C,Farotti L,Salvadori N,Moretti D,Savelli G,Tarallo A,Nobili F,Parap

doi

10.1007/s00259-019-04466-6

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

270-280

issue

2

eissn

1619-7070

issn

1619-7089

pii

10.1007/s00259-019-04466-6

journal_volume

47

pub_type

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