The horseshoe kidney is a fusion of the upper or lower poles of both kidneys. The horseshoe kidney occurs in the fourth to sixth week of early embryonic life as a result of the fusion of both kidney embryos by tight squeezing between the umbilical arteries, and many factors can cause the fusion of the lower poles. Some patients may be completely asymptomatic, while most patients develop symptoms due to compression of the nerve plexus, blood circulation or ureter, with pain in the upper abdomen, umbilicus or lower back, chronic constipation and urinary symptoms such as chronic pyelonephritis, hydronephrosis and stones, with hydronephrosis occurring in 80% of cases.