Trachealization of oesophagus is seen in?
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.
Eosinophilic esophagus
Schatzki ring
GERD
Herpes simplex esophagitis
Bleeding from the GUT and diseases of esophagus