body-modification

Subdermal implants: body-mods that give you cool lumps

The process creates a raised area on the skin in a shape of the artist's choosing. The effect is dramatic: Implants can be most any form you can think of, from Star Trek ridges and small horns, to little stars and hearts sprayed across the chest. Many people with body modifications have combined their implants with tattoos to create often beautiful or terrible effects.

皮下に物質を埋め込むんだそうで、星形やハート型等が有るそうです。
SF 映画に出て来そうですね。
ロバート・デ・ニーロがスタートレックに出演する時は本当にこういう手術を受けそう。