What Is Lymphocytic Oesophagitis
The importance of eosinophils and neutrophils infiltrating oesophageal squamous epithelium as markers for reflux, eosinophilic oesophagitis, and infection are well entrenched, although traditionally less attention has been paid to lymphocytes.
Small numbers of lymphocytes are normally seen in oesophageal epithelium including CD4 helper and CD8 positive cytotoxic lymphocytes.
However, isolated increases in lymphocytes in the oesophageal epithelium, outside the context of entities such as lichen planus and graft versus host disease, have been less well recognised until recently.
The criteria for a diagnosis of lymphocytic oesophagitis, where lymphocyte numbers are markedly increased with few or no eosinophils, is not strictly defined since this is still a reaction pattern and not a specific diagnosis per se, and thresholds vary from study to study. The strictest definition requires at least 50 intraepithelial or peripapillary lymphocytes per HPF with few or ...