Because stones rarely occur in the urinary bladder in children, 7 cases are reported to stress the fact that they may be overlooked and to emphasize the signs and symptoms which they cause. The incidence in this country has varied from 0.066 per cent in the present series (7 patients among 10,650 children admitted to Duke Hospital from 1930 to 1942) to 1.63 per cent at the Mayo Clinic.1 The age distribution of vesical calculus also varies: In America less than 2 per cent of the afflicted persons are children, while Thomson reported a childhood distribution of 25 per cent in China,2 Noble found a 22 per cent distribution in children under 11 years of age in Thailand3 and Assenfeldt, in his series in Austria, found a 77 per cent distribution in children.4 The usual factors predisposing to formation of vesical stones in children are the
TUDOR RB. STONES IN THE URINARY BLADDER IN CHILDREN: DIAGNOSIS AND TREATMENT IN SEVEN CASES. Am J Dis Child. 1943;65(4):591–592. doi:10.1001/archpedi.1943.02010160075009
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