Pediatric Urology UNUSUAL CONFIGURATION OF CROSSED FUSED RENAL ECTOPIA: CASE REPORT STUART J. SCHWARTZ
AND
Crossed fused renal ectopia is a congenital displacement of one kidney to the contralateral side. It is a relatively rare phenomenon, found in 1 of 373 to 5,308 excretory urograms (IVPs). 1 Six types of crossed fused renal ectopia have been described: 1) the unilateral fused kidney with the ectopic kidney inferior, 2) the sigmoid kidney, 3) the L-shaped kidney, 4) the discoid kidney, 5) the lump kidney and 6) the unilateral fusion in which the ectopic kidney is superior to the normally located kidney (rarest).
CASE REPORT
A 7-year-old white girl was referred for urologic consultation after the second attack of urinary tract infection. Physical examination was unremarkable and the patient responded promptly to Accepted for publication July 21, 1972. 1 Abeshouse, B. A.: Crossed ectopia with fusion; review of literature and report of 4 cases. Amer. J. Surg., 73: 658, 1947. 491
DAVID J. SHAHEEN
antimicrobial therapy. An IVP showed prompt function from both kidneys but they appeared to be located on the left side with normal configuration, giving the impression that this was a double x-ray exposure (part A of figure). A cystogram, cystoscopy and vaginoscopy were within normal limits. A retrograde pyelogram revealed the same findings present on the IVP (part B of figure). DISCUSSION AND SUMMARY
A crossed fused renal ectopia in which the
superior kidney is the ectopic one is reported. We could not find a similar case reported in the literature. The calices are lateral to the renal pelvis and the ureters drain medially in normal fashion. The fact that these kidneys were not marred by obstruction makes the case a remarkable finding. The usual pattern in which the ectopic kidney is superior has the calices pointing medially and the ureter draining laterally. 3 Parkside Court, Utica, New York 13501