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We present a case of a 74-year-old man with a gastric cancer diagnosis with an incidental finding of a horseshoe kidney during an evaluation of response to chemotherapy in a computerized tomography study.
Horseshoe kidney is the most common congenital kidney disease, with an incidence of 0.25% in the general population. Yet, it is the most frequent renal fusion anomaly, and has been associated with higher frequency of chromosomal abnormalities.
Horseshoe kidney is asymptomatic in a third of patients diagnosed through incidental findings during imaging studies. This is a rare diagnosis, but we must keep in mind that it could be associated with different cancers, and it might require special interdisciplinary approaches. Our patient did not require treatment because he was asymptomatic.