Primary gastric lymphomas (PGL) are more common than lymphomas with involvement of other organs and cover a wide spectrum of immunomorphological variants: from indolent marginal zone lymphoma to aggressive diffuse large B-cell lymphoma. PGLs are not characterized with any specific clinical manifestations, which sometimes leads to misdiagnosis. Due to the rareness of the disease many PLG-related issues remain unresolved, this provided the background for the present review.