Table 3.

Histological data

Variable
Percutaneous renal tumor biopsy procedures (n = 84)†
Pathology, n (%)  Benign  Malignant  Non-diagnostic	14 (16.7) 53 (63.1) 17 (20.2)
Samples’ diagnosis, n (%)  Clear cell carcinoma  Clear and papillary cell carcinoma  Papillary carcinoma  Colic adenocarcinoma  Oncocytoma  Chromophobe carcinoma  Undefined carcinoma  Angiomyolipoma  Melanoma  Lymphoma  Myeloma	30 (44.7) 1 (1.5) 9 (13.4) 2 (3.0) 10 (14.9) 3 (4.5) 3 (4.5) 4 (6.0) 1 (1.5) 3 (4.5) 1 (1.5)
Tumor grade, n (%)‡  1  2  4	18 (45.0) 20 (50.0) 2 (5.0)
Patients undergoing renal surgery (n = 42)
Nephrectomy, n (%)  Partial  Total	26 (61.9) 16 (38.1)
Pathology, n (%)  Benign  Malignant	0 (0.0) 42 (100)
Histological diagnosis, n (%)  Clear cell carcinoma  Clear and papillary cell carcinoma  Papillary carcinoma  Colic adenocarcinoma  Chromophobe carcinoma	25 (59.5) 2 (4.8) 9 (21.4) 1 (2.4) 5 (11.9)
Tumor grade, n (%)‡  1  2  3  4	9 (25.0) 21 (58.3) 4 (11.1) 2 (5.6)

n – number;

^†- repeated biopsies included;

^‡- clear and papillary renal cell carcinoma