Abstract
A SURVEY of the literature concerning cholelithiasis reveals no agreement on the probable etiology of this common disease. Several authors have postulated a congenital familial factor that predisposes to this condition, and a familial occurrence has been reported on several occasions.1 2 3 4 I have been able to find only one reference to cholelithiasis occurring in identical twins. Tesler,4 in 1946, reported apparent cholelithiasis in female, identical twins aged nineteen, 1 of which was proved by operation; the other had a typical history, and x-ray study showed "a poorly functioning gallbladder with radiolucent shadows suggestive of calculi."As further evidence of a . . .

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