多房性囊腫腎瘤是腎臟的一種罕見腫瘤。它通常表現為單一性且多半是單側的腫瘤。腫瘤由多個互不相通的囊腫組成，覆蓋著一層扁平或立方上皮細胞；其中亦可發現沒有分化的腎實質在腫瘤中。通常在孩童期多以腹部腫瘤表現，而在成人多出現一些泌尿系統之症狀。目前，由於診斷工具的進步及它在電腦斷層和超音波之特殊表徵，常常在未開刀即可做正確的診斷。如果手術前能得到正確診斷，當可避免日後的全腎切除手術。
Multilocular cystic nephroma is an uncommon neoplasm of the kidneys. It is typically unilateral and solitary, composed of nocommunicating cysts which are lined by flattened or cuboid epithelium and with nondiffernentiated renal elements within the tumor. It presents as a quiescent abdominal mass in children, but in adults it is quite symptomatic. With the improvement of diagnostic imaging modalities and with its characteristic features on computerized tomography (CT) scan and ultrasound, correct diagnosis can be made preopatively, and total nephrectomy can usually be avoided.
