Intraepithelial lymphocytosis is an elevated white blood cell count in your gastrointestinal tract. It can be a sign of celiac disease, Crohn’s disease, or other gastrointestinal conditions. The ...

Human cancer under a microscope. The black dots on the right of the image are lymphocytes which are trying to get at the tumor, but are being stopped by cancer-associated fibroblasts. Disclaimer: AAAS ...