apotemnophobia

Etymology
From +.

Noun

 * 1)  A fear of amputation (afraid that one will lose appendages), fear of amputations (fear of amputations on others), fear of amputees (persons with amputations).

Usage notes
While the etymological antonym is, different senses have different antonyms: apotemnophilia is used to refer to wishing to be an amputee oneself (desire of amputation of one’s own body, rather than fear), with (paraphiliac) love for amputees being instead referred to as.