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