CT:

• An exophytic hyperdense lesion is seen in the upper pole of the right kidney.

  右腎上極高密度結節(jié)，突向腎外,。

• Lesion demonstrates enhancement on arterial and portal venous phases.

  增強掃描動脈期及靜脈期可見病灶強化。

MRI:

• An exophytic enhancing lesion is seen in the upper pole of the right kidney corresponding to hyperdense CT mass.

  與CT對應,，可見右腎上極腫塊,，向腎外生長,。

• T1 and T2 hypointense relative to kidney.

  T1WI和T2WI上，病灶相對于腎臟呈略低信號,。
  

• Restricts diffusion.

  彌散受限,。

• No fat within the lesion, demonstrated on chemical shift imaging.

  病灶內無脂質成分，可見化學位移位移,。

• No invasion of subjacent renal sinus fat.

  病灶沒有侵犯鄰近腎竇脂肪,。

• Transitional cell carcinoma: Centrally located, poorly defined, peripherally dilated calyces.

  移行細胞癌：位置一般更靠近腎臟內部，邊界不清,，鄰近腎盞擴張,。

• Angiomyolipoma: Detection of macroscopic fat.

  血管平滑肌脂肪瘤：病灶內可見脂肪成分

• Oncocytoma: Cannot establish a definitive diagnosis and most require biopsy or surgery.

  嗜酸細胞瘤：單純通過影像很難確診，需要結合病理或手術明確診斷,。

• Primary lymphoma: Usually large retroperitoneal mass than engulfs the kidney.

  原發(fā)性淋巴瘤：腹膜后腫塊,，通常體積較大，包繞腎臟,。

• Secondary lymphoma: Hematogenous metastases to the kidneys in patients with known prior treated lymphoma. Multiple bilateral homogenous hypodense and hypoenhancing lesions are characteristic.

  繼發(fā)性淋巴瘤：其他部位淋巴瘤血行轉移至腎臟,。典型表現(xiàn)為雙腎多發(fā)均勻稍低密度病灶，增強后略強化,。

Papillary renal cell carcinoma

乳頭狀腎細胞癌

• Clear cell: Most common subtype = 75% of renal cell carcinomas in most series

  腎透明細胞癌：最常見的類型,，約占腎細胞癌的75%。

• Papillary: Second most common subtype

  乳頭狀腎細胞癌：第二常見亞型,。

• Chromophobe 腎嫌色細胞癌

• Collecting duct 腎集合管癌

• Unclassified 未分類腎細胞癌

Imaging Findings for Specific Subtypes

Clear cell RCC 腎透明細胞癌:


• Tend to have greater enhancement and more heterogeneity.

  通常更加不均勻,，增強掃描強化更明顯

• Termed clear cell by pathologists secondary to intracellular lipid and glycogen; the former can be detected by loss of signal intensity on opposed phase images when compared with corresponding in phase images.

  病理科醫(yī)師將細胞內脂質和糖原稱為透明細胞，病灶內的脂質成分可以通過MR同反相位上的信號衰減檢測出來,。

Papillary cell RCC 乳頭狀腎細胞癌：

• Enhances less than clear cell carcinoma.

  強化低于腎透明細胞癌

• No lipid on chemical shift imaging.

  化學位移成像示病灶內沒有脂質成分

• Restricts diffusion to a greater degree than clear cell carcinoma.

  相對于腎透明細胞癌,，彌散受限更明顯。

• Lower T2-weighted signal intensity than clear cell renal carcinoma

  T2WI信號低于腎透明細胞癌,。