You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Trachealization of oesophagus is seen in? and explain in detail?
The presence of multiple corrugated rings and linear furrows all through a narrowed oesophagus is called Trachealisation of oesophagus/feline oesophagus. This is seen in eosinophilic esophagitis. Histological confirmation of eosinophilic esophagitis is made with demonstration of 15 eosinophils per HPF.