Table 3.

Sensitivity and specificity of membranous HEG1 staining for diagnosis of mesothelioma (whole sections)

	N	Positive	Negative	Sensitivity (%)	Specificity (%)
EM or BM	89	79	10
Carcinoma	130	10	120	88.8	92.3
Reactive mesothelial cells	3	3	0	88.8	0
SM	28	0	28
Mesenchymal tumor	16	3	13	0	81.3
Fibrous pleuritis	21	1	20	0	95.2

Abbreviations: BM, biphasic mesothelioma; EM, epithelioid mesothelioma; N, total; SM, sarcomatoid mesothelioma.