RT Journal A1 MUFSON I T1 COngenital bilateral stricture of the ureter JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1919 FD July 26 VO 73 IS 4 SP 262 OP 263 DO 10.1001/jama.1919.02610300026008 UL http://dx.doi.org/10.1001/jama.1919.02610300026008 AB If we may judge from the literature on the subject, congenital stricture of the ureter is not rare; but a bilateral congenital stricture of the ureter is a rare defect, only eight cases, exclusive of the one here recorded, having been described. From the few cases recorded it would appear that these strictures are most often discovered at the extremes of life, most of them having become evident before the age of 5 years. Two cases have occurred in adults, one at the age of 25 years and the other at the age of 62.No apparent reason for this congenital anomaly presents itself in studying the development of the urinary system. The ureters are primary derivatives of the bladder, growing cephalad to meet the metanephric tissue. Their lumina appear either as a result of central absorption of the epithelial outgrowth or are present primarily in the process of their