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Summary— In a study of 251 children (108 boys, 143 girls) undergoing videourodynamic studies for the assessment of non-neuropathic bladder dysfunction, 45 (19%) were found to have a wide bladder neck as their primary abnormality. Based on these studies there is evidence that the wide bladder neck anomaly is congenital in origin. In addition to producing significant urinary symptoms in childhood, this anomaly may provide a basis for stress incontinence in later life.