Duplications of the alimentary tract are rare and occur in 1 of 4500 births (Duplication of the stomach: report of a case and review of the English literature. Arch Surg 1961; 82:634-640). Gastric duplications constitute 8% of these or roughly 17 of every 1,000,000 births (Shew SB, Holcomb GW. Alimentary tract duplications. In: Ashcraft KW, Holcomb GW, Murphy JP, editors. Pediatric surgery. Philadelphia, PA: Elsevier, 2005. p. 543-552). Symptoms often occur by 2 years and can include nausea, vomiting, hematemesis, and vague abdominal pain. Occasionally, a palpable abdominal mass may be identified on physical examination. We offer an unusual and previously unreported presentation of a gastric duplication cyst.