Selinexor Plus Combination Chemotherapy in Treating Patients With Advanced B Cell Non-Hodgkin Lymphoma

Inclusion Criteria

• •Phase 1 Part: Patients with pathologically confirmed advanced stage B-cell NHL (Ann Arbor stage 3 or 4) for whom R-CHOP is considered appropriate therapy; newly diagnosed DLBCL, newly diagnosed low grade B cell NHL, and previously treated low grade B cell NHL patients in first relapse after a prior treatment with non-anthracycline containing chemotherapy are allowed; double hit and transformed diffuse large B cell lymphoma are allowed
• •\* Allowed low grade B cell lymphomas will include follicular lymphoma any grade, marginal zone lymphoma including mucosa-associated lymphoid tissue (MALT) lymphoma, indolent mantle cell lymphoma and Waldenstrom's macroglobulinemia
• •Phase 2 Part: Patients with pathologically confirmed newly diagnosed diffuse large B cell lymphoma (Ann Arbor stage 3 or 4); newly diagnosed double hit and transformed diffuse large B cell lymphoma are allowed
• •Patients must have measurable disease, defined as at least one lesion above and below the diaphragm or stage 4 disease that can be accurately measured in at least one dimension; lymph nodes should be considered abnormal if the long axis is \> 1.5 cm, regardless of the short axis
• •Allowed prior therapy:
• •* Newly diagnosed DLBCL and low grade B cell lymphoma: No prior therapy is allowed except steroids equivalent to maximum of prednisone 20 mg once daily for maximum of seven days prior to registration
• •* Relapsed/refractory low grade B cell lymphoma (only allowed in phase I): A minimum and maximum of one line of prior non-anthracycline containing therapy is allowed; prior localized radiation therapy is not considered a line
• •* For patients who have had prior chemotherapy or immunotherapy, at least 2 weeks must have elapsed between last dose and initial dose of RCHOP-selinexor; for patients treated with radio-immunotherapy, at least 12 weeks
• •All races and ethnic groups are eligible for this trial
• •Eastern Cooperative Oncology Group (ECOG) performance status =\< 1 (Karnofsky \>= 60%)
• •Life expectancy of greater than 6 months
• •Premenopausal female patients of child-bearing potential must agree to use dual methods of contraception and have a negative serum pregnancy test at screening, and male patients must use an effective barrier method of contraception if sexually active with a female of child-bearing potential; acceptable methods of contraception are condoms with contraceptive foam, oral, implantable or injectable contraceptives, contraceptive patch, intrauterine device, diaphragm with spermicidal gel, or a sexual partner who is surgically sterilized or post-menopausal; for both male and female patients, effective methods of contraception must be used throughout the study and for three months following the last dose
• •Ability to understand and the willingness to sign a written informed consent document