Table 1.

ARID1A immunoreactivity in ovarian endometriotic cysts and associated ovarian clear cell and well-differentiated endometrioid carcinomas.

Case	Endometrioma	Ovarian clear cell carcinoma	Ovarian endometrioid carcinoma
1	Loss	Loss	Not present
2	Loss	Loss	Not present
3	Loss	Loss	Not present
4	Loss	Loss	Not present
5	Loss	Loss	Not present
6	Loss	Loss	Not present
7	Loss	Loss	Not present
8	Loss	Loss	Not present
9	Loss	Loss	Not present
10	Loss	Loss	Not present
11	Loss	Loss	Not present
12	Loss	Loss	Not present
13	Loss	Loss	Not present
14	Loss	Loss	Not present
15	Loss	Loss	Not present
16	Loss	Loss	Not present
17	Loss	Loss	Not present
18	Loss	Loss	Not present
19	Loss	Not present	Loss
20	Loss	Not present	Loss
21	Loss	Not present	Loss
22	Loss	Not present	Loss
23	Loss	Not present	Loss
24	Loss	Not present	Loss
25	Loss	Not present	Loss
26	Loss	Not present	Loss
27	Loss	Not present	Loss
28	Loss	Not present	Loss
29*±	Loss	Loss	Loss
30*	Loss	Loss	Loss
31	Loss	Not present	Loss
32	Retained	Retained	Not present
33*	Retained	Retained	Retained
34	Retained	Not present	Retained
35	Retained	Not present	Retained
36	Retained	Not present	Retained
37	Retained	Not present	Retained
38	Retained	Not present	Retained
39	Retained	Not present	Retained
40	Retained	Retained	Not present
41	Retained	Retained	Not present
42	Retained	Retained	Not present
43	Retained	Retained	Not present
44	Retained	Retained	Not present
45	Retained	Not present	Retained
46	Retained	Not present	Retained
47	Retained	Not present	Retained

Shaded cases represent those non-informative cases (ARID1A staining in all lesions).

^*cases containing both ovarian endometrioid and clear cell carcinomas.

^±cases containing endometrioid borderline tumors