[1][2] He made several feature films, perhaps best known for Ruggero Deodato's The House on the Edge of the Park, and Dario Argento's Tenebrae.
[3] Borromeo began his career with a part in the Italian film Lezioni di violoncello con toccata e fuga in 1976.
[3] Then he went on to star as 'Germano' in the 1979 erotic comedy Ups and Downs of a Super Stud (Pensione Amore Servizio Completo) directed by Luigi Russo.
[3] In 1980, he starred in Ruggero Deodato's ensemble-thriller The House on the Edge of the Park, and in 1982 he also played a brief, but major supporting part in Dario Argento's giallo-slasher Tenebrae,[4][5] and the same year also managed to play the part of 'Lotario' in Ehrengard by director Emidio Greco.
[3] He effectively ended his acting career in 1997, with his last movie-appearance in the TV-movie Inquietudine.