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WHO Classification of Tumours
Adenofibroma, NOS
Kidney


Definition

A benign neoplasm histologically characterized by the presence of connective tissue stroma and epithelial structures
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Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
3rd Edition
IARC Press: Lyon 2002



.
Metanephric adenofibromas of the kidney are typically solitary, partially cystic masses. They are composed of nodules of epithelium identical to metanephric adenoma that are embedded in sheets of moderately cellular spindle cells. The borders of the tumour are typically ill-defined and irregular

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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



. There is no tendency for malignant progression and the prognosis is favourable.