PSP-parkinsonism (PSP-P) is an atypical variant of progressive supranuclear palsy (PSP), a rare late-onset neurodegenerative disease. The disease is Monarch Disease Ontology id MONDO_0009839 (progressive supranuclear palsy-parkinsonism syndrome). Also known as: PSP-p, PSP-parkinsonism, supranuclear palsy, progressive atypical.