We present the first case of a metastasizing renal cell carcinoma arising within a partially regressed multicystic dysplastic and ectopic left kidney in a 34-year-old patient. Despite nephrectomy and adjuvant immunotherapy, the patient died 4 months after diagnosis. Even though a recent systematic review found no evidence to support any of the different modalities for following up children with MCKD by ultrasound (Oxford Centre for Evidence-Based Medicine, Level of Evidence: 3a), our case supports the contrary and we emphasize that an annual control could be an important diagnostic choice (Level of Evidence: 4).

Keywords:
Multicystic dysplastic kidney, Ectopia, Renal cell carcinoma
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© 2008 S. Karger AG, Basel
2008
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