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antrectomy

(distal gastrectomy) A procedure in which the gastric antrum (distal third of the stomach) is excised. Gastrectomies are further defined by the type of reconstruction used to reestablish gastrointestinal continuity. (Examples of gastrectomy) • total gastrectomy: The whole stomach is removed. • partial gastrectomy: The lower part of the stomach is removed. • sleeve gastrectomy: The left side of the stomach is removed. • oesophagogastrectomy: The top part of the stomach and part of the oesophagus is removed. (Examples of partial gastrectomy) • antrectomy: 30% resection • hemigastrectomy: 50% resection • subtotal gastrectomy: 80% resection (Examples of antrectomy) • Billroth I procedure: Partial gastrectomy. The removal of a portion of the stomach from the upper left side to the lower right side. It can be fashioned in either an end-to-end or end-to-side manner. • Billroth II procedure: Loop-type gastrojejunostomy (reconstruction). The gastric remnant is anastomosed to the side of the proximal jejunum, in an end-to-side manner. • Roux-en-Y gastric bypass (Roux-en-Y anastomosis): Gastrojejunostomy. It bypasses part of the stomach and the duodenum.