Abstract: The author reported a case of crossed fused renal ectopia of ⁹⁹Tc^m-DTPA renography, which is rare and lacks specific symptoms. This article clarifies the characteristics from the clinical features, laboratory test, pathology and imaging examination, and evaluates the renal function by ⁹⁹Tc^m-DTPA renal dynamic imaging, aiming to provide a powerful reference for the detection, diagnosis and treatment of the disease in clinical work.