Figure 1From: Association of phosphatase and tensin homolog low and phosphatidylinositol 3-kinase catalytic subunit alpha gene mutations on outcome in human epidermal growth factor receptor 2-positive metastatic breast cancer patients treated with first-line lapatinib plus paclitaxel or paclitaxel aloneRepresentative PTEN IHC staining. Arrows point to stromal cells with positive PTEN staining. IHC, immunohistochemistry; PTEN, phosphatase and tensin homolog.Back to article page