Clinical utility of DaTscan in clinically uncertain parkinsonian syndromes: a systematic review and meta‑analysis.
BACKGROUND Clinically uncertain parkinsonian syndromes (CUPS) pose diagnostic challenges, particularly in distinguishing degenerative from non‑degenerative etiologies. DaTscan (123I-ioflupane SPECT) is frequently used to clarify ambiguity, but the magnitude of its diagnostic impact across different initial clinical sus...