Enasidenib for Patients With Clonal Cytopenia of Undetermined Significance and Mutations in IDH2A Decentralized Trial

Inclusion Criteria: * Unexplained cytopenia for at least 6 months. Cytopenia is defined as the presence of ≥1 blood count indexes below the following thresholds: * Hgb \<10 g/dL * ANC \<1.8 × 109/L * Platelets \<100 × 109/L * IDH2 gene mutation (R140 or R172), performed locally, at a frequency ≥ 2%. * At least 18 years of age. * ECOG performance status 0-2 * Adequate organ function as defined below: * AST(SGOT)/ALT(SGPT) ≤ 3.0 x IULN * Serum total bilirubin \< 1.5 x IULN (un upper limit of bilirubin 5 mg/dL is acceptable if it can be attributed to Gilbert's syndrome or erythropoiesis) * Creatinine clearance \> 50 mL/min by Cockcroft-Gault glomerular filtration rate estimation or serum creatinine ≤ 2 x IULN * The effects of enasidenib on the developing human fetus are unknown. For this reason, women of childbearing potential and men must agree to use adequate contraception prior to study entry, for the duration of study participation, and for 24 months after the last dose of enasidenib. Should a woman become pregnant or suspect she is pregnant while participating in this study, she must inform her treating physician immediately. Men treated or enrolled on this protocol must also agree to use adequate contraception prior to the study, for the duration of the study, and for 4 months after the last dose of enasidenib. * Ability to understand and willingness to sign an IRB approved written informed consent document. Legally authorized representatives may sign and gi…