Table 2.

 Expression of ATM, p53, and MRN complex proteins in myoepithelial tumours

Case	Diagnosis	ATM score	p53	p63	CK5/6	ER	αSMA
1	Adenomyoepithelioma	4	Negative	+	+	NA	NA
2	Adenomyoepithelioma	0	Negative	NA	NA	NA	NA
3	Adenomyoepithelioma	0	NA	++	NA	++	++
4	Malignant myoepithelioma	3	Positive	+	+	–	+
5	Malignant myoepithelioma	3	Negative	++	++	NA	NA
6	Malignant myoepithelioma	2	Positive	++	++	–	++
7	Malignant myoepithelioma	2	Positive	++	++	–	++
8	Malignant myoepithelioma	0	Positive	++	++	–	+
9	Malignant myoepithelioma	0	Positive	–	NA	NA	NA
10	Malignant myoepithelioma	0	Negative	++	++	–	–
11	Malignant myoepithelioma	0	Negative	++	++	NA	NA
12	Malignant myoepithelioma	0	Negative	++	NA	NA	NA
13	Malignant myoepithelioma	0	NA	++	++	++	–
14	Matrix producing breast carcinoma	3	Positive	+	+	–	+
15	Sarcomatoid breast carcinoma	0	Positive	+	+	–	++
16	Sarcomatoid breast carcinoma	0	Negative	NA	NA	–	–
17	Sarcomatoid breast carcinoma	12	Positive	++	+	–	–
18	Sarcomatoid breast carcinoma	0	Negative	++	++	–	–

+, focally positive; ++, diffusely positive; αSMA, α smooth muscle actin; ER, oestrogen receptor; NA, not available.