[The role of Helicobacter pylori infection in hematological diseases - a review].

Helicobacter pylori (H. pylori) infection has been known to be the most closely associated with extra-gastrointestinal diseases. Above all, the association between H. pylori and hematological diseases, including immune thrombocytopenic purpura ( ITP), gastric MALT lymphoma and iron deficiency anemia (IDA) has been focused. Although the molecular mechanisms have not yet been fully understood, H. pylori eradication resulted in high response rates without major adverse effects. We focus here on a comprehensive review of the current literature of ITP, gastric MALT lymphoma and IDA.