Duodenal date seed bezoar: a very unusual cause of partial gastric outlet obstruction.

Bezoars are concretions of undigested or partially digested foreign material in the gastrointestinal or genitourinary tract of humans or animals. Originally described from Persia, they have been known to mankind for centuries. Bezoars are an uncommon cause of benign mechanical gastric outlet obstruction. A variety of materials have been found to form bezoars, such as hair, undigested food, persimmons, milk products, medicines, etc. Development of bezoars is usually associated with predisposing risk factors. We describe a very unusual case of duodenal date seed bezoar causing partial gastric outlet obstruction in a person with no known risk factors. To the best of our knowledge, duodenal bezoars formed by date seeds have not been reported previously in the English literature.