Crossed fused renal ectopia is generally an incidental finding for an otherwise normal kidney, but associated with various urological abnormalities. To date, the diagnosis of this abnormality was made by ultrasonography, excretory urography and computed tomography. Multidetector com-puted tomographic (MDCT) urography depicts the normal urinary tract anatomy, including both the renal parenchyma, collecting structures and ureters. Congenital fusion anomalies of kidney are easily depicted with MDCT urography than with conventional computed tomography. Herein we report four cases of crossed fused renal ectopia associated with other urological abnormalities that was suspected or diagnosed by ultrasonography and confirmed by MDCT urography and review the available literature. This report underlines the importance of MDCT urography in the diagnosis of congenital anomalies of urinary tract especially renal fusions.
Keywords: crossed fused renal ectopia, renal fusion, ectopic kidney, congenital renal malformation, MDCT
