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Dedifferentiated cystic nephroma with malignant mesenchymoma as the dedifferentiated component
1Servico de Anatomia Patologica e Citopatologia, Instituto Nacional do Cancer, Rio de Janeiro, Brazil.
Abstract:
Cystic tumors of the kidney are uncommon and usually do not have solid areas. We report a predominantly cystic renal tumor with solid anaplastic component showing rhabdomyoblastic and cartilaginous differentiation in a 26-month-old girl. Terminology and pathogenesis of tumor progression are discussed along with a review of reports of tumors associated with cystic nephroma.