Fig. 4
From: Breast neuroendocrine tumor arising in the axilla of a man: a case report
Proliferation and phenotypes in the tumor. A Ki-67 staining; the proliferation index was 20.8% in the densest spot of the high-power field (400 × magnification) and was calculated using the following formula: ([the number of positive tumor cells/total number of tumor cells] × 100). B–F Phenotypes in the tumor assessed with immunohistochemical analyses for Cam 5.2 (B), synaptophysin (Syp: C), estrogen receptor (ER: D), progesterone receptor (PR: E), and GATA-binding protein 3 (GATA3: F). A-F. Magnification, 100 × ; scale bar, 100 μm