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WHO Classification of Tumours
Ossifying renal tumor


A benign neoplasm of the kidney occurring in infants. It develops as an intracalyceal mass and is characterized by the presence of osteoid formation, osteoblast-like cells, and spindle cells
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Eble JE, Sauter G, Epstein JI, Sesterhenn IA (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Urinary System and Male Genital Organs.
3rd Edition
IARC Press: Lyon 2004