Metanephric adenoma is a unique renal tumor with benign biologic behavior in spite of their large size. 后腎腺瘤盡管體積較大，但卻為胚胎發(fā)育過(guò)程中后腎來(lái)源的良性腫瘤，較少見(jiàn)。
Currently, no reliable histologic criteria exist to separate small renal cortical adenomas that lack the potential to progress from those that are capable of metastases. 目前病理學(xué)上尚無(wú)法將無(wú)進(jìn)展潛力的小的腎腺瘤與那些具有轉移危險的病變區分開(kāi)來(lái)。
