|
Growth pattern
|
|
Tubulocystic
|
5 (6.8)
|
|
Solid
|
2 (2.7)
|
|
Tubulocystic/Solid
|
6 (8.2)
|
|
Papillary
|
25 (34.2)
|
|
Papillary/Tubulocystic
|
20 (27.4)
|
|
Papillary/Solid
|
6 (8.2)
|
|
Tubulocystic/Solid/Papillary
|
9 (12.3)
|
|
at least focal papillary componen
|
60 (82.2)
|
|
Cell type
|
|
Clear cell
|
11 (15.1)
|
|
Oxyphil cell
|
5 (6.8)
|
|
Mixed with Clear and oxyphil cell
|
57 (78.1)
|
|
Hobnailing
|
41 (56.2)
|
|
Columnar cell
|
2 (2.7)
|
|
Mitotic figures (/10 HPF)
|
|
0–9
|
65 (89.0)
|
|
10–19
|
8 (11.0)
|
|
Stroma
|
|
Hyalinized only
|
4 (5.5)
|
|
Myxoid only
|
1 (1.4)
|
|
Fibroblastic only
|
23 (31.5)
|
|
Fibroblastic/Hyalinized
|
20 (27.4)
|
|
Fibroblastic/Myxoid
|
4 (5.5)
|
|
Hyalinized/Myxoid
|
1 (1.4)
|
|
Fibroblastic/Hyalinized/Myxoid
|
20 (27.4)
|
|
Other miscellaneous characteristics
|
|
Focal or patchy necrosis
|
29 (39.7)
|
|
Targetoid bodies
|
3 (4.1)
|
|
Psammoma bodies
|
8 (11.0)
|
|
Mucin secretion
|
8 (11.0)
|
|
Open tumor rings
|
6 (8.2)
|
|
Nuclear pseudoinclusions
|
6 (8.2)
|
