| Gross and Microscopic Features |
Oncocytoma (16)
n (%) |
ChRCC (21)
n (%) |
p |
| Tumoral contour |
|
|
|
| Rounded |
16 (100) |
20 (95) |
ns |
| Infiltrative |
0 (0) |
1 (5) |
ns |
| Central scar |
10 (62.5) |
3 (14) |
<0.001 |
| Grown pattern Nested |
16 (100) |
2 (10) |
<0.001 |
| Sheet |
0 (0) |
19 (90) |
<0.001 |
| Vascular permeation |
3 (19) |
5 (24) |
ns |
| Adipose tissue extension |
5 (31) |
1 (5) |
0.012 (ns) |
| Presence of mitosis |
0 (0) |
16 (76) |
<0.001 |
| Presence of necrosis |
0 (0) |
2 (10) |
ns |
| Raisinoid nuclei Fuhrman nuclear grade |
0 (0) |
19 (90) |
<0.001 |
| 1-2 |
6 (37.5) |
3 (14) |
ns |
| 3 |
8 (50) |
12 (57) |
ns |
| 4 |
0 (0) |
6 (29) |
0.019 (ns) |
| Ancillary techniques |
| HCI positive |
2 (13) |
20 (95) |
<0.001 |
| CD15 positive |
13 (81) |
4 (19) |
<0.001 |
| CK7 positive |
1 (6) |
18 (86) |
<0.001 |
| Concordance of 3 markers |
10 (63) |
13 (62) |
ns |
| Concordance of 2 markers |
16 (100) |
21 (100) |
<0.001 |
|
