Table 2 Histologic diagnoses of 168 renal masses based on subcutaneous image-guided core needle biopsies (CNB)
CNB Diagnosis | Subtypes | Initial CNB No.  (%) | After 2nd CNB* No.  (%) | ||
|---|---|---|---|---|---|
RCC | Â | 112 | (66.7) | 117 | (69.6) |
| Â | Clear Cell | 69 | (41.1) | 74 | (44.0) |
| Â | Papillary | 19 | (11.3) | 19 | (11.3) |
| Â | Chromophobe | 9 | (5.4) | 9 | (5.4) |
| Â | Rare variant | 5 | (3.0) | 5 | (3.0) |
| Â | Un-subclassified | 10 | (6.0) | 10 | (6.0) |
Benign Neoplasm | 22 | (13.1) | 24 | (14.3) | |
| Â | Oncocytoma | 16 | (9.5) | 18 | (10.7) |
| Â | Angiomyolipoma | 5 | (3.0) | 5 | (3.0) |
| Â | Papillary Adenoma | 1 | (0.60) | 1 | (0.60) |
Malignant, non-RCC | 5 | (3.0) | 5 | (3.0) | |
Subtotal | Â | 139 | (82.7%) | 146 | (86.9%) |
Atypical | Â | 7 | (4.2) | 6 | (3.6) |
Negative | Â | 22 | (13.1) | 16 | (9.5) |
Total | Â | 168 | (100.0) | 168 | (100.0) |