progressive supranuclear palsy-pure akinesia with gait freezing syndrome (MONDO_0016562, a Monarch Disease Ontology id) can be described as follows. PSP-Pure akinesia with gait freezing (PSP-PAGF) is an atypical variant of progressive supranuclear palsy (PSP), a rare late-onset neurodegenerative disease. Also known as: PSP-PAGF, PSP-pure akinesia with gait freezing.