Crossed Fused Renal Ectopia: A Rare Malformation Diagnosed in Context of Pyelonephritis in Yaounde – Cameroon

Abstract

The authors report a case of crossed renal ectopia with fusion of the upper renal poles, a rare congenital anomaly of the urinary system in which one of the two kidneys is on the contralateral side, the ureter of the ectopic kidney crosses the midline to plug into the bladder on the normal side. For this 8-year-old male patient, radiological exploration was performed for periumbilical and hypogastric abdominal pain with fever and dysuria caused by a pyelonephritis. Some cases of crossed-renal ectopia remain asymptomatic and the diagnosis is often incidental. Abdominal ultrasound is the first-line imaging technique for the diagnosis which is confirmed by the CT-scan. The interest of this case is both epidemiological, diagnostic and didactic because it is very rare and the medical imaging plays an important role to underpin this diagnosis.