Metanephric adenoma

Clinical features

Most often seen in women in the fifth decade.

Macroscopic appearances

Tumours are well circumscribed. Small tumours are white; larger tumours may be haemorrhagic.


These are epithelial tumours composed of tubules and papillae forming "glomeruloid bodies". Cells are uniformly bland. Psammoma bodes may be present.

Metanephric adenofibroma is a variant which combined areas of metanephric adenoma with areas of fibrosis.

FNA cytology of metanephric adenoma resembles a papillary thyroid lesion




Differential diagnosis


There is a single report of lymph node metastasis2.


1Renshaw, A. A. (2002). "Subclassification of renal cell neoplasms: an update for the practising pathologist." Histopathology 41(4): 283-300.


2Renshaw, A. A., D. R. Freyer, et al. (2000). "Metastatic metanephric adenoma in a child." Am J Surg Pathol 24(4): 570-4.

This page last revised 5.1.2004.

©SMUHT/PW Bishop