noun
autoantibody
Medical term for an antibody that targets the body's own tissues.
自己抗体の検査で陽性反応が出た。
The autoantibody test came back positive.
抗体 is a general antibody, while 自己抗体 specifically targets the body's own cells.
Compound of 自己 (self) and 抗体 (antibody), a direct translation of the English medical term 'autoantibody'.