late quaternary neurosyphilis paralytic dementia 94.1 https://en.wikipedia.org/wiki/General_paresis_of_the_insane https://www.wikidata.org/wiki/Q1932655 A52.17 A severe neuropsychiatric disorder, classified as an organic mental disorder and caused by the chronic meningoencephalitis that leads to cerebral atrophy in late-stage syphilis. Degenerative changes are associated primarily with the frontal and temporal lobar cortex. The disease affects approximately 7% of infected individuals. general paresis general paresis of the insane treponema pallidum infection The Complete Dictionary of Sexology