Crossed renal ectopia with an unusual form of fusion (inverted U shape) managed by novel approach – laparoscopic ureterocalicostomy. A case report

Herein we present a case of crossed renal ectopia with an unusual type of fusion, discovered incidentally in a 11-year-old girl presented with recurrent urinary tract infections. Both kidneys were located on the right side of the body fused in their upper poles only, forming an inverted U shape. After reviewing the published data on this topic, we found that most of the described anomalies were within the six well-known types of fusion anomalies. This child had an unusual clinical presentation of severe hydronephrosis of the orthotopic kidney. A unique surgical technique to correct the pathology to be able to preserve the residual mass of that kidney was performed.