Amputee fetishism refers to a fetish focused on amputations, generally of limbs. Two subtypes of this fetish are generally recognized. Acrotomophilia is an intense desire for one’s partner to be an amputee. Apotemnophilia is an intense desire to be an amputee.
Acrotomophiles are also known as “devotees.” Aptemnophiles are also known as “wannabes.” With each, the presence or absence of artificial limbs as an added stimulant is a personal matter for the fetishist. A “pretender” is a “wannabe” who acts out aptemnophilic fantasies, sometimes in public, usually through limb-binding and the use of loose clothing.
Amputation fetishism is technically a teratophilia, sexual attraction to a deformed or monstrous person. Wikipedia hosts a list of other curious forms of paraphilias.
For what I remember the first presence of this fetish on the Internet was on the Usenet newsgroup alt.sex.fetish.amputee, featuring stories and pictures, in the far 1996. Actually you can find some content in the categories medical fetish, special fetish and extreme fetish of Fetish Bank. A good commercial site for this topic is Amputee Porn.