Normal Ureteral Diameter in Infancy and Childhood

Abstract

Ureteral diameters were estimated on films from intravenous urography in 194 children (100 boys and 94 girls) aged 0-16 years. Children with signs of urinary tract infection, calculi, obstruction, duplication or malformation were excluded. Films obtained without abdominal compression were used for measurements, including only ureters visualized over 50 per cent of their lengths. A good correlation was demonstrated between ureteral diameter and age (r = 0.69) and between ureteral diameter and the length of a segment of the lumbar spine (r = 0.73). The widest part of the ureter was most often located just above the crossing of the iliac vessels. The right ureter was slightly wider than the left one. No difference between boys and girls was noted. The results are in good agreement with those of others obtained at autopsy. Bearing in mind the possible physiologic variations, it would seem that measuring the ureteral diameter can be of value for a more objective differentiation between dilated and non-dilated ureters.

Renal Function and Urine Drainage after Conservative or Operative Treatment of Primary (Obstructive) Megaureter in Infants and Children

“…Moreover, it was revealed that the UNC patients had a more distinct dilatation of the ureter initially than the ''non-UNC'' group. For group 1 we determined 9 ± 3 mm (4-34) proximally and 7±3 mm (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) distally. The maximum pre-operative diameter of the 16 neoimplanted ureters later was 15 ± 3 mm (6-25) proximally and 15 ± 5 mm (6-23) distally.…”

“…The criteria of inclusion were the sonographic diagnosis of a dilatation of the supravesical urinary tract with an elongated, dilated or convoluted ureter of >6 mm [9]; the renographic proof of an impairment of the urine transport as well as the exclusion of a vesicoureterorenal reflux, a subvesical obstruction or a neurogenic bladder.…”

Kock Urinary Reservoir Maturation in Children and Adolescents: Consequences for Kidney and Upper Urinary Tract

“…Using urography films, the ureteric width was measured and evaluated versus age according to the reported material by Hellström et al [9]. The ureter pattern was classified as normal (≤ +2 SD), moderately dilated (+2 to +3 SD) and severely dilated (> +3 SD).…”

Rare case of non-refluxing non-obstructive megaureter in an adult

“…Megaureter describes an abnormally dilated ureter above 7 mm [1] and can be classified according to the cause of the dilatation [2] (Fig. 2).…”