Franca Stoppi replaced another actress who was originally cast as Iris, and she signed on to act in this film without reading the script beforehand.
Pig skin and offal from a butcher were used for the autopsy scene.
Inspired the lyrics to the song "Deathmask Divine", by Michigan-based melodic death metal band The Black Dahlia Murder.
In Germany this horror film was on the index for 40 years and was confiscated several times.