Selinexor With ICE Chemotherapy in Secondary Central Nervous System Involving B-cell Non-Hodgkin Lymphoma

Inclusion Criteria: * Patients must have histologically confirmed B-cell NHL with CNS involvement DLBCL including ABC, GCB or PMBCL subtypes Indolent lymphomas transformed to aggressive lymphomas Follicular lymphomas * Patients must have received at least one cycles of anthracycline based chemotherapy administered with curative intent * Patients must be age ≥18 years. * Patients must have at least one site of measurable disease, 1.5 cm in diameter or greater. * Patients must have ECOG performance status of 0-2. * Patients must have laboratory test results within these ranges: Absolute neutrophil count ≥ 1500/mm³, Platelet count ≥ 100,000/mm³, Serum creatinine clearance ≥40 mL/min, Total bilirubin ≤ 1.5x ULN (Higher levels are acceptable if these can be attributed to active hemolysis or ineffective erythropoiesis.), AST (SGOT) and ALT (SGPT) ≤ 2x ULN * Women of childbearing potential must agree to use dual methods of contraception and have a negative serum pregnancy test prior to selinexor treatment. Male patients must use an effective barrier method of contraception if sexually active with a female of child-bearing potential. * Patients must be able to understand and willing to sign a written informed consent document. * Patients must be able to adhere to the study visit schedule and other protocol requirements. * Patients must not have any serious medical condition, laboratory abnormality, or psychiatric illness that would prevent the subject from signing the informed consent form. * Patients must not have any condition, including the presence of laboratory abnormalities, which places the subject at unacceptable risk if he/she were to participate in the study or confounds the ability to interpret data from the study. * Patients with hepatitis B virus including HBsAg-positive carrier or IgG anti- HBc-positive can be enrolled if they can receive anti-viral prophylaxis Exclusion Criteria: * Patients cannot fulfill the above-mentioned inclusion criteria * Patients with primary CNS lymphoma * Patients with a prior history with selinexor