Helicobacter pylori Infection, Chronic Inflammation, and Genomic Transformations in Gastric MALT Lymphoma

Table 1

Ann Arbour clinical staging for gastric lymphoma.

Stage	Localization
I E	Confined within the gastric wall
II E1	Involvement of stomach and contiguous lymph nodes
II E2	Involvement of stomach and noncontiguous subdiaphragmatic lymph nodes
III	Lymph nodes on both sides of the diaphragm
IV	Visceral metastasis or second extranodal site

Subscripts that can be added to staging:
E: extranodal, when lymphoid tissue outside lymph nodes is involved.
X: is added when the largest diameter is above 10 cm (called bulky disease).
S: is added when the spleen is involved.
A or B: B is added when one of B symptoms is present, and A is for asymptomatic patients.