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Deciphering the A-T+ enigma: Clinical relevance or diagnostic noise?
Simone Salemme1,2,3, Annalisa Chiari2, Giovanna Zamboni2,3
1Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.
None:
A recent Danish memory clinic cohort study sheds light on the enigmatic A-T+ biomarker profile - defined by elevated CSF p-tau181 in the absence of amyloid pathology. This commentary explores the clinical and conceptual implications of A-T+, arguing that it reflects a heterogeneous, non-Alzheimer group and highlighting the need to rethink A-T+ within a broader neurobiological framework. A-T+ is not diagnostic noise, but a call to investigate diverse pathways of neurodegeneration beyond amyloid-tau paradigms.
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