IMDb’s database is massive but not perfect. It’s possible that a student film, a local TV movie, or a very low-budget independent project named Sindrome was released in 2004 and never gained traction. If you saw it at a film festival or on a niche DVD, it might exist but lack a proper IMDb page.

Check these possibilities:

IMDB lists several films with "Syndrome" in the title, but only a handful from 2004. The Erik B. S. Larsen film is the only one indexed that uses the exact spelling "Sindrome" in some international metadata tags. If you search manually on IMDb using the tt code (though the public ID is difficult to trace due to purged short-film reels), you will find a bare-bones listing lacking a poster and user reviews.

IMDB Rating: N/A (Too few votes) Genre: Short, Drama, Horror

The number one reason people search for "Sindrome 2004" is a simple case of mistaken identity. The word Sindrome (Spanish/Italian for "Syndrome") is often confused with:

The most probable film you’re thinking of is The Skeleton Key (released 2005, but often misremembered as 2004). Starring Kate Hudson, this psychological horror film revolves around Hoodoo—a magic system involving herbs, candles, and a debilitating condition that mimics a stroke. That condition is often called "the syndrome" in discussions of the film.

Nota: No tengo los datos exactos en mi base offline; ¿quieres que busque la entrada actualizada en IMDb y te devuelva la sinopsis, elenco y puntuación?