Type of mastectomy where there is removal of the breast alone?

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Simple mastectomy removes all breast tissue, including the nipple-areolar complex, without removing axillary lymph nodes or chest wall muscles. That’s why it’s the option that describes removing the breast alone. The other approaches involve additional structures: removing the axillary lymph nodes (and sometimes other tissues) in a modified radical mastectomy; removing the chest wall muscles in a radical mastectomy; and removing only the tumor with a margin in a lumpectomy, which preserves most of the breast.