Table 1: Characteristics and histopathological findings of immune-mediated gastritis secondary to Nivolumab in monotherapy.

Tumor

Gastritis pattern

Other diagnoses

Year

Melanoma

Intraepithelial lymphocytosis, neutrophilic activity, apoptosis, crypt abscesses

Absent

2020 [3]

Hodgkin lymphoma

Intraepithelial lymphocytosis with predominance of CD3

Esophagitis

2017 [6]

Melanoma

Lymphohistocyte aggregates around actively inflamed glandular epithelium

Duodenitis

Colitis

2020 [7]

Melanoma

Intraepithelial CD8 T-type lymphocytosis accompanied by neutrophilic activity and occasional karyorrhexis

Absent

2021