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Segmentectomy is the excision (removal) of a portion of any organ or gland. The procedure has several variations and many names, including segmental resection, wide excision, lumpectomy, tumorectomy, quadrantectomy, and partial mastectomy.
A prostatectomy is a surgical procedure for the partial or complete removal of the prostate. It may be performed to treat prostate cancer or benign prostatic hyperplasia. A common surgical approach to prostatectomy includes making a surgical incision and removing the prostate gland (or part of it).