Fig. 1
From: A study of the correlation between M2 macrophages and lymph node metastasis of colorectal carcinoma
Expression of M2 macrophages in lymph nodes. Detection of CD163 in lymph nodes of colorectal carcinoma patients by immunohistochemistry. The membrane and cytoplasm of M2 macrophages are stained brown. Microscopic analysis of a typical example of CD163 expression in non-metastatic lymph nodes (a, b, c magnification × 100, × 200, × 400, respectively). d, e Location of CD163 in metastatic lymph node tissue at a magnification of × 200 and × 400 respectively. M2 macrophages are seen mainly infiltrating into the tumor stroma