Horseshoe kidney

Case contributed by Ammar Haouimi
Diagnosis certain


Recurrent urinary tract infections.

Patient Data

Age: 16 years
Gender: Female

Both kidneys are malrotated, fused at their lower poles forming a parenchymal bridge (isthmus) crossing the midline anterior to the aorta and IVC at L2-L3 level. Mild dilatation of the renal cavities and ureters.

Case Discussion

CT features of Horseshoe kidney.

Horseshoe kidney is considered as the most common type of renal fusion anomaly. On imaging, especially on ultrasound, the parenchymal isthmus crossing the midline anterior to the aorta and IVC should not be mistaken for a midline retroperitoneal mass such as lymphoma or metastatic lymphadenopathy.

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