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![Correlation of elevated mast cell and micro-vessel densities with lymph node metastasis in oral squamous cell carcinoma](https://image.oaes.cc/c7147886-77c8-47c9-9b78-4a43ba58027c/2496.fig.2.png)
Figure 2. (A) Toluidine blue stain to demonstrate the invasive front (note mast cells are not seen at this magnification); (B) toluidine blue stain to show mast cells (×40). Arrows indicate the areas with mast cells while triangles show tumour nests; (C) immunohistochemical staining to show micro-vessels (×4) (golden brown color vessels ×10)