noun
lumpectomy; tumor removal surgery
Medical term for surgical removal of a tumor, typically a breast lump, while preserving surrounding tissue.
彼女は乳がんの診断後、腫瘍摘出手術を受けた。
She underwent a lumpectomy after being diagnosed with breast cancer.
乳房切除術 (mastectomy) removes the entire breast, while 腫瘍摘出手術 removes only the tumor and a small margin of healthy tissue.
Compound of 腫瘍 (tumor), 摘出 (extraction), and 手術 (surgery).