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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.
Craniectomy. A craniectomy is a surgical procedure performed when the portion of the skull removed during brain surgery is not replaced immediately. Reasons for the neurosurgeon to perform a craniectomy include: creating room the brain swelling after traumatic injury, removing infected portions of the skull, or removing portions of the skull where traumatic injury has resulted in multiple fragments.