Eosinophilic oesophagitis (EoE) is a disease of the oesophagus. Oesophagitis is inflammation of the lining of the oesophagus (gullet). The symptoms of inflammation are the body’s natural response to injury or irritation.
The main cells involved in the inflammation in EoE are eosinophils, which are a type of white blood cell. Eosinophils play an important role in the body’s response to infection. They are also involved in inflammation that occurs in allergic disorders.
Normally, eosinophils are present in very low levels in the body, but in EoE, large numbers are found in the tissue of the oesophagus.