Fig. 1

HER3 immunohistochemistry. a Positive control (prostate), b Concurrently high (score 3+) membranous and cytoplasmic HER3 expression (breast carcinoma), c High (score 3+) membranous HER3 expression with negative/low (score 0) cytoplasmic HER3 status, d Negative/low total cellular HER3 staining. Mayer's Hematoxylin used as a counterstain