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Table 1 Population (n = 53) and Tumor (n = 100) characteristics

From: Renal cell carcinoma lung metastases treated by radiofrequency ablation integrated with systemic treatments: over 10 years of experience

CharacteristicN (%)
Patient Sex
 Male34 (64.2)
 Female19 (35.9)
Patient age at diagnostic (years)
 Median (interquartile range)61 (20–84)
Patient age at Radiofrequency ablation treatment (RFA) (years)
 Median (interquartile range)67 (29–86)
Treatment before RFA (per patient)28 (53)
 Interferon18 (34)
 Sunitinib9 (17)
 Sorafenib1 (2)
Primary histology (per patient)
 Clear cell carcinoma48 (90)
 Papillary carcinoma1 (2)
 Mucinous tubular renal cell carcinoma RCC missing information1 (2)1 (2)
 Sarcomatoid component (10%)2 (4)
T staging (per patient)
 T1 – T219 (36)
 T3 – T425 (47)
 Unknown9 (17)
Tumor size in mm (per lesion)
  < 1032 (32)
 10 < x < 2043 (43)
 20 < x < 3015 (15)
  ≥ 309 (9)
 missing1 (1)
Time to metastasis (months)
 Median (interquartile range)22 (7–53)
Number of metastases (per patient)
 125 (47)
 211 (21)
 39 (17)
 4–68 (15)
Number of RFA treatments (per patient)
 141 (77)
 212 (23)
Fuhrman grade (per patient)
 11 (2)
 29 (17)
 326 (49)
 45 (9)
 Unknown2 (3)
Time to recurrence (all types, per patient)
  ≤ 12 months20 (38)
  > 12 months33 (62)
Concomitant metastases (per patient)
 Concomitant10 (19)
 Delayed43 (81)