Lymphoma rarely occurs during pregnancy, making this condition difficult to define. Lymphomas that occur in reproductive organs during pregnancy exhibit unique clinical characteristics. Among the limited cases, non-Hodgkin’s lymphoma(NHL) shows a considerably higher incidence rate than Hodgkin’s lymphoma(HL); NHL also displays clinical characteristics, such as high aggressiveness, advanced stage, and poor outcome. This study reports on four cases of lymphomas in non-gonadal organs(HL,n=2; NHL, n=2) during pregnancy. The tumors rapidly progressed in all patients during pregnancy but remitted at the end of pregnancy and/or therapy. The two HL cases were nodular sclerosis classical HL and treated with chemotherapy after terminating the pregnancy. One of the NHL cases was primary cutaneous follicular center lymphoma, a B cell-derived indolent lymphoma.The patient was followed up without any therapy after terminating her pregnancy. The other case was a follicular lymphoma grade3 B, which was treated with chemotherapy after delivery. We also conducted a literature review of 165 lymphoma cases occurring during pregnancy reported from 1976 to 2013 to reveal the correlation between pregnancy and lymphoma progression.Immunohistochemistry studies were performed to determine the expression of estrogen/progesterone receptors(ER/PR), and ER was weakly positive and sporadic. We concluded that lymphomas occurring during pregnancy should be managed with a prompt and reasonable treatment. High estrogen level in maternal body may affect lymphoma progression. Lymphoma rarely occurs during pregnancy, making this condition difficult to define. Lymphhomas that occurs in pregnancy, make this condition difficult to define. Lymphoma rarely occurred during pregnancy, making this condition difficult to define. Lymphoma rarely occurring during pregnancy, making this condition difficult to define. ; NHL also displays clinical characteristics, such as high aggressiveness, advanced stages, and poor outcomes. This study reports on four cases of lymphomas in non-gonadal organs (HL, n = 2; NHL, n = 2) during pregnancy. rapidly progressed in all patients during pregnancy but remitted at the end of pregnancy and / or therapy. The two HL cases were nodular sclerosis classical HL and treated with chemotherapy after terminating the pregnancy. One of the NHL cases was primary cutaneous follicular center lymphoma, a B cell-derived indolent lymphoma.The patient was followed up without any therapy after terminating her pregnancy. The other case was a follicular lymphoma grade 3 B, which wa We also conducted a literature review of 165 lymphoma cases occurring during pregnancy reported from 1976 to 2013 to reveal the correlation between pregnancy and lymphoma progression. Immunohistochemistry studies were performed to determine the expression of estrogen / progesterone receptors (ER / PR), and ER was weakly positive and sporadic. We noted that lymphomas occurring during pregnancy should be managed with a prompt and reasonable treatment. High estrogen level in maternal body may affect lymphoma progression.