Ureteric ectopia

Anomalies of renal position and rotation are well demonstrated by the high resolution anatomic images. Horseshoe and ectopic kidneys can be easily separated from the background and overlying tissues. Pelvic kidneys in particular, which often are significantly smaller than the normally positioned kidney, are well demonstrated with MR urography (Fig. 1.2.13). Hypoplastic kidneys associated with ureteric ectopia and supernumerary kidneys, which have been difficult to demonstrate with other imaging modalities, can usually be demonstrated even if there is minimal renal function. 

General Considerations 110 Duplication and VUR 110 Ureteral ectopia 110 Ureterocele 111... 

Ureteric Duplication, Ureteric Ectopia, and Associated Anomalies 341... 

Crossed renal ectopia is the second most common fusion anomaly after horseshoe kidney, with an incidence of 1 in 7,000 autopsies (Abeshouse and Bhisitkul 1959). The crossed ectopic kidney lies on the opposite side from the ureteral insertion of the bladder. There are four varieties of renal crossed ectopia (Fig. 4.4) (McDonald and McClellan 1957 Abeshouse and Bhisitkul 1959). Crossed renal ectopia with fusion occurs in 85%,... 

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