Diagnostic usefulness of the floating door sign was tested in 144 PD patients, 41 essential tremor patients and 38 controls. There were no differences in the presence of floating door sign between PD and ET patients. The sign does not seem to be a reliable differential diagnostic tool.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9932557PMC
http://dx.doi.org/10.1016/j.prdoa.2023.100184DOI Listing

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