Close
The sections show a multilocular cystic lesion, arising from the renal cortex. The lesion bulges into but shows a circumscribed interface with the perinephric fat.
The lesions is multilocular with intervening areas of cellular stroma.
Variably sized epithelial lined tubules and cysts surrounded by fibromuscular stroma.
Columnar surface epithelium overlying cellular fibromuscular stroma.
The stroma characteristically shows positive staining for ER