parasyphilis

noun

para·​syph·​i·​lis -ˈsif-(ə-)ləs 

: any of several diseases (as tabes dorsalis or general paresis) of the central nervous system that develop in the late stages of untreated syphilis and were formerly believed to be only indirectly related to it

parasyphilitic

-ˌsif-ə-ˈlit-ik 

adjective