Acrotomophiles are strongly attracted by the physical disability of a person, specifically amputees and their shortened limbs.
However, today it is also used to describe being sexually excited by spastics, paralysis or people relying on a wheelchair or crutches.
There is a thorough article on this topic by Nature and a fantastic article about Acromotomophila, background and case studies from Dr. Mark Griffiths. Both are far too long to summarize here.
Almost all acrotomophiles are male, the sources for that paraphilia are still not fully clear.
The counterpart is Apotemnophilia, which describes the sexual interest in being an amputee.
Do I Need to Worry if I am an Acrotomophile?
Contrary to common believe, this is not an obsession, but a stimulation by imperfection.
The majority of acrotomophiles and their partners have a wonderful relationship.