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Heterotopic gastric tissue in the gallbladder is an extremely rare condition. There is not any specific clinical or laboratory finding and correct diagnosis is not possible before histopathological examination. Preoperative diagnosis usually resembles a polypoid Lesion or a fixed gallstone. We reported a 34-year-old female patient with heterotopic gastric mucosa in the gallbladder associated with congenital hip dysplasia and kidney agenesis. Laparoscopic cholecystectomy was performed and histopathology of the resected specimen showed that the "polyp" consisted of heterotopic gastric mucosa with glands of body and fundic type. Some cases of heterotopia in the gallbladder come from metaplasia, and may be one of the causes of gall bladder cancer. We discussed the clinical and histologic features of heterotopic gastric tissues and reviewed reported cases in the literature.