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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 colostomy is a surgical procedure in which an opening (stoma) is formed by drawing the healthy end of the large intestine or colon through an incision in the anterior abdominal wall and suturing it into place. End colostomy: A stoma is created from one end of the bowel. 2  The other portion of the bowel is either removed or sewn shut (Hartmann's procedure). 3  Double barrel colostomy: The bowel is severed and both ends are brought out onto the abdomen.