[Mixed epithelial and stromal tumour of the kidney: a case report]

Mixed epithelial and stromal tumours of the kidney are rare. Histologically, they are characterised by a complex of epithelium and stroma with cystic and solid areas. They usually occur in perimenopausal women receiving hormone replacement with oestrogen. Typical symptoms are haematuria, flank pain and a palpable mass, with more and more authors reporting incidentally diagnosed tumours. This also applies to our case report. We are reporting the first published case in Germany: a 60-year-old female with a mixed epithelial and stromal tumour of the right kidney. The tumour was removed through complete nephrectomy.