metanephric adenoma

metanephric adenoma

A benign, well-circumscribed, non-encapsulated, usually unilateral tumour, that is often an incidental finding in asymptomatic patients.

Clinical findings
Haematuria, polycythaemia, palpable mass.

DiffDx
Papillary renal cell carcinoma, Wilms tumour.
References in periodicals archive ?
Metanephric Adenoma (MA) is a histologically and clinically unique and rare benign renal epithelial tumour.
Metanephric Adenoma (MA) also designated "Nephrogenic adenoma" or "Embryonal adenoma" is a rare benign renal tumour which is histologically, immunohistochemically and clinically unique, with an indolent clinicobiological behaviour.
The case was diagnosed and confirmed as metanephric adenoma.
6 Thus Wilms' tumour and metanephric adenoma are histogenetically related and MA is considered to be the benign counterpart of Wilms' tumour in adults.
The unique features of metanephric adenoma should be clinically and pathologically recognised because of its invariably benign course and treatment with conservative local resection.
Diffuse metanephric adenoma after in-utero aspirin intoxication.
Metanephric adenoma of the kidney: Clinical and radiological study of nine cases.
The positivity for cytokeratin 7, cytokeratin 8/18, and vimentin is useful in differentiating papillary RCC from other primary renal neoplasms, including metanephric adenoma, chromophobe RCC, oncocytoma, and urothelial cell carcinoma of the renal pelvis.
Metanephric adenoma is typically well circumscribed on gross examination and displays a solid, tan mass, similar to the solid variant papillary RCC.
Metanephric adenoma, nephrogenic rests, and Wilms' tumor: a histologic and immunophenotypic comparison.
Apart from these lesions, there are many kind of benign lesions (leiomyoma, metanephric adenoma, lipoma etc.
World Health Organization (WHO) histological classification of benign renal neoplasms Renal cell tumors Metanephric tumors Mesenchymal tumors Oncocytoma Metanephric adenoma Angiomyolipoma Papillary adenoma Metanephric adenofibroma Leiomyoma Metanephric stromal tumor Hemangioma Lymphangioma Reninoma Fibroma Schwannoma Renal cell tumors Mixed epithelial mesenchymal tumors Oncocytoma Cystic nephroma Papillary adenoma Mixed epithelial and stromal tumor