PET and SPECT imaging as a solid guide to detect and discriminate atypical phenotypes of neurodegenerative disorders

Obrazek miniatury
Ruffini, Livia
Zilioli, Alessandro
Cervati, Veronica
Lauretan, Fulvio
Misirocchi, Francesco
Maggio, Marcello
Migliari, Silvia
Graziani, Tiziano
Cidda, Carla
Baldari, Giorgio
Tytuł czasopisma
Tytuł tomu
Publishing Office of the University of Rzeszow
Introduction and aim. Atypical or mixed presentations of neurodegenerative disorders may postpone or confound the final diagnosis. Molecular imaging with positron emission tomography (PET) and single photon emission computed tomography (SPECT) radioligands provide target-specific information and may anticipate the diagnosis by “in vivo” detection of the neuro pathological substrate, as Aβ deposition, nigrostriatal dopaminergic depletion or tau inclusions. This concise review will dis cuss the potential of PET and SPECT imaging as a solid guide to better characterize atypical phenotypes of neurodegeneration in the clinical routine, with the potential to drive personalized interventions, improve cohort uniformity for clinical trials, and serve as biomarkers for targeted molecular therapies. Material and methods. Literature search was performed focusing on the role of PET and SPECT imaging in assessing atypical phenotypes of neurodegeneration, using the electronic source of database PubMed/MEDLINE and the web-based search engines Google, Google Scholar. Analysis of the literature. New disease-modifying drugs may increase their effect with early initiation, which is especially im portant in working persons and younger subjects presenting atypical symptoms. In older individuals, the coexistence of neu rodegeneration, age-related changes, cerebrovascular lesions, or depression makes challenging a definitive diagnosis. Quantitative tools able to measure tracer distribution increase the accuracy of molecular neuroimaging creating topographic maps that compare subject’s data with healthy controls databases. Conclusion. Atypical phenotypes may be associated with quantitative key-pattern allowing a more precise and early diagnosis of the neurodegenerative disorder. Finally, quantitative assessment of the pathological substrates allows us to track the disease process and measure treatment response.
The review figures are derived from scans of patients included in the following protocols approved by the Ethical Committee of our institution (345/2019/OSS*/AOUPR and 666/2021/FARM/AOUPR).
Słowa kluczowe
atypical phenotypes , neurodegenerative diseases , positron emission tomography , single photon emission computed tomography
European Journal of Clinical and Experimental Medicine T. 22, z. 1 (2024), s. 201–221