surgical scar; operation scar
Refers to a scar left after a surgical procedure. Neutral medical/descriptive term.
腹部に手術痕が残っている。
A surgical scar remains on the abdomen.
手術痕は時間とともに薄くなる。
The operation scar fades over time.
Compound of 手術 (surgery) + 痕 (scar, mark).