Monarch Disease Ontology term MONDO_0016563 (progressive supranuclear palsy-corticobasal syndrome) can be described as follows. PSP-corticobasal syndrome (PSP-CBS) is an atypical variant of progressive supranuclear palsy (PSP), a rare late-onset neurodegenerative disease. Also known as: PSP-CBS, PSP-corticobasal syndrome.