
Madhouse
- annos singulos: 1981
- Patriam: Italy, United States of America
- genus: Horror
- Studio: Overseas FilmGroup
- keyword: birthday, psychopath, twin sister, animal attack, rottweiler, revenge, mental institution, rabid dog, video nasty, female teacher
- Director: Ovidio G. Assonitis
- cast: Trish Everly, Allison Biggers, Michael MacRae, Dennis Robertson, Morgan Hart, Edith Ivey