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Table 1 Fuhrman grades of clear cell renal cell carcinoma (ccRCC) in each morphology

From: Tumor grade of clear cell renal cell carcinoma assessed by contrast-enhanced computed tomography

  Fuhrman grade Total
1 2 3 4  
Cystic* 3 (13.6%) 16 (72.7%) 3 (13.6%) 0 (0%) 22
Well-circumscribed 6 (5.0%) 72 (60.5%) 38 (31.9%) 3 (2.5%) 119
Lobulated† 0 (0%) 14 (46.7%) 12 (40.0%) 4 (13.3%) 30
Infiltrative‡ 0 (0%) 5 (11.6%) 19 (44.2%) 19 (44.2%) 43
  1. Note. *Cystic ccRCC has significantly lower grades than well-circumscribed ccRCC (P =0.025). †Lobulated ccRCC is higher grade than well-circumscribed ccRCC (P =0.018). ‡Infiltrative ccRCC is higher grade than lobulated ccRCC (P =0.00029).