**5. Endoscopic features**

Endoscopically, the most frequent findings are a normal esophagus or esophagitis [2, 3, 11]. Up to 33% of cases from the cohort by Haque *et al*. had findings suspicious of eosinophilic esophagitis such as stricture, rings, or felinization without eosinophilic esophagitis on the biopsies [2]. As described later, no other gastrointestinal involvement or association with gastritis or duodenitis has been described, thus stomach and duodenum endoscopic appearance is normal [12].

The endoscopic features are variable and not specific, which makes it impossible to identify and diagnose lymphocytic esophagitis by only relying on symptoms and gastroscopy. It is still a histologic condition, which is why biopsy is essential for the diagnosis.
