Pancake Kidney With Obstructed Moiety: A Rare Renal Fusion Anomaly

Crossed fused renal ectopia (pancake type) with single ureter: A case report

Crossed fused renal ectopia is a rare congenital anomaly of renal embryogenesis. The majority of such anomalous kidneys are supplied by a single renal artery and drained by two separate ureters. However, drainage by a single common ureter is an unusual variant. Here, we present a 17-year old male with a pelvic pancake kidney drained by a single ureter with associated acute obstructive uropathy diagnosed with ultrasonography and computed tomography urography (CTU). We describe the anatomical peculiarity and diagnostic evaluation of the case.

Fetal Pancake Kidney: Prenatal Diagnosis and Postnatal Follow-up

Bilateral failure of the kidneys to ascend during embryonic life may lead to fusion of the two renal masses, resulting in a round mass known as pancake kidney. Reviewing the literature, we did not encounter any reports of prenatal diagnosis of pancake kidneys. We present 6 cases of a pancake kidney diagnosed prenatally. Extrarenal associated anomalies included an aberrant right subclavian artery, nonvisualization of the uterus, consistent with Mayer-Rokitansky-Küster-Hauser syndrome, and a sequence of early-onset growth restriction, hypospadias, and syndactyly, suspected as Smith-Lemli-Opitz syndrome. On postnatal follow-up, all infants had a normal renal outcome.