Yaqo RT, et al. - Researchers compared age-specific incidence rates (ASIRs), age-adjusted incidence rates (AAIRs), and incidence rate ratios (IRRs) of non-Hodgkin lymphoma (NHL): Hodgkin lymphoma (HL) using the cancer registries of Iraq, Jordan, Saudi Arabia, and US SEER. Data revealed the NHL AAIR (95% CI) per 100,000 population of 4.4 for Iraq, 5.4 for Jordan, 4.7 for Saudi Arabia, and 13.2 for the United States. They noted the HL AAIR of 1.8 for Iraq, 1.8 for Jordan, 2.1 for Saudi Arabia, and 2.3 for the United States, with respective NHL:HL IRR of 2.4, 3.0, 2.2, and 5.7. The Middle Eastern countries thus have a slightly lower incidence of HL than the United States, but markedly lower rates of adult NHL with advancing age, including the predominant diffuse large B-cell lymphoma (DLBCL), that accounted for the low NHL:HL IRR.