думаю, что это разновидность body integrity dysphoria

>Body integrity dysphoria (BID), also referred to as body integrity identity disorder (BIID), amputee identity disorder or xenomelia, and formerly called apotemnophilia, is a mental disorder characterized by a desire to have a sensory or physical disability or feeling discomfort with being able-bodied, beginning in early adolescence and resulting in harmful consequences.

>BID is a rare, infrequently studied condition in which there is a mismatch between the mental body image and the physical body, characterized by an intense desire for amputation or paralysis of a limb, usually a leg, or to become blind or deaf. The person sometimes has a sense of sexual arousal connected with the desire for loss of a limb, movement, or sense.

>Some act out their desires, by pretending they are amputees using prostheses and other tools to ease their desire to be one, by using a wheelchair or by pretending they are blind or deaf. Some people with BID have reported to the media or by interview with researchers that they have resorted to self-amputation of a "superfluous" limb by, for example, allowing a train to run over it or otherwise damaging it so severely that surgeons will have to amputate it.

https://en.wikipedia.org/wiki/Body_integrity_dysphoria

Есть же https://en.wikipedia.org/wiki/Blanchard%27s_transsexualism_typology