Tanssitauti is an EP by CMX released in 1990. The band had released their debut album Kolmikärki earlier the same year with a different lineup. Tanssitauti is the first CMX recording to feature guitarist Janne Halmkrona, who appears on all of the band's albums from this point on. The album's 27-second, originally unnamed opening track "Matti" has become a fan favourite and is sometimes loudly requested on CMX concerts. A live version of "Pimeä maa" appears on the 1997 compilation album Cloaca Maxima. "Tanssitauti", literally "Dance Disease", is Finnish and is used to refer to Huntington's disease.