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Epidemiology of Renal Metastases
Renal metastases are the most common malignant manifestation of the kidneys in autopsies. Common primary cancer sites are lung cancer, breast cancer, gastrointestinal cancer, malignant melanoma and lymphoma.
Diagnostic Work-Up or Renal Metastases
Imaging:Renal ultrasound and CT of the abdomen. Renal metastases are typically multifocal lesions in the kidney. In addition, imaging reveals often extrarenal metastases. Metastases from lung cancer, breast cancer or colon cancer may present as single large lesions, a distinction to renal cell carcinoma may be difficult.
Biopsy of the kidney is used to confirm the diagnosis, especially if a curative resection (with treatment of the primary tumor) is not intended.
Treatment of Renal Metastases
Palliative nephrectomy is rarely necessary. Treatment is normally limited to chemotherapy and/or medical palliation of symptoms.
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Deutsche Version: Nierenmetastasen