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Sandipkumar H. Patel, Sumithira Vasu, Ling Guo, Olivia Lemaster, John C. Byrd and Alison Walker

Acute undifferentiated leukemia (AUL) is a subtype of acute leukemias of ambiguous lineage. There is no standard treatment approach for AUL, although acute lymphoblastic leukemia–like regimens for induction therapy have been used. Additional data suggest that AUL may be better treated as acute myeloid leukemia (AML), given their similarities in genetic, cytogenetic, and gene expression patterns. Somatic mutations of IDH1 are found in 7% to 14% of patients with AML; however, the patient in this study was the first patient with IDH1-mutated AUL treated with ivosidenib. In this case, a woman aged 39 years was found to have anemia and thrombocytopenia after presenting to her primary care physician with fatigue, weight loss, and persistent infections. During further workup of the cytopenia, she was diagnosed with AUL and received 7+3 (daunorubicin, 60 mg/m2/d intravenously on days 1–3, and cytarabine, 100 mg/m2 24-hour continuous intravenous infusion on days 1–7) due to the presence of the IDH1 mutation. Bone marrow biopsy performed on day 14 of 7+3 showed persistent disease, and ivosidenib was initiated due to severe HLA alloimmunization (panel-reactive antibody, 100%) and significant bleeding complications. The patient achieved a complete morphologic and molecular remission on ivosidenib monotherapy despite critical bleeding complications during induction. Targeted therapy using ivosidenib may represent an encouraging therapeutic option in patients with AUL and IDH1 mutations. Additional evaluation of ivosidenib in this subgroup of patients with AUL is needed.

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Jeffrey Crawford, Pamela Sue Becker, James O. Armitage, Douglas W. Blayney, Julio Chavez, Peter Curtin, Shira Dinner, Thomas Fynan, Ivana Gojo, Elizabeth A. Griffiths, Shannon Hough, Dwight D. Kloth, David J. Kuter, Gary H. Lyman, Mary Mably, Sudipto Mukherjee, Shiven Patel, Lia E. Perez, Adam Poust, Raajit Rampal, Vivek Roy, Hope S. Rugo, Ayman A. Saad, Lee S. Schwartzberg, Sepideh Shayani, Mahsa Talbott, Saroj Vadhan-Raj, Sumithira Vasu, Martha Wadleigh, Peter Westervelt, Jennifer L. Burns and Lenora Pluchino

Myeloid growth factors (MGFs) are given as supportive care to patients receiving myelosuppressive chemotherapy to reduce the incidence of neutropenia. This selection from the NCCN Guidelines for MGFs focuses on the evaluation of regimen- and patient-specific risk factors for the development of febrile neutropenia (FN), the prophylactic use of MGFs for the prevention of chemotherapy-induced FN, and assessing the risks and benefits of MGF use in clinical practice.

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Pamela Sue Becker, Elizabeth A. Griffiths, Laura M. Alwan, Kimo Bachiashvili, Anna Brown, Rita Cool, Peter Curtin, Shira Dinner, Ivana Gojo, Ashley Hicks, Avyakta Kallam, Wajih Zaheer Kidwai, Dwight D. Kloth, Eric H. Kraut, Daniel Landsburg, Gary H. Lyman, Ryan Miller, Sudipto Mukherjee, Shiven Patel, Lia E. Perez, Adam Poust, Raajit Rampal, Rachel Rosovsky, Vivek Roy, Hope S. Rugo, Sepideh Shayani, Sumithira Vasu, Martha Wadleigh, Kelly Westbrook, Peter Westervelt, Jennifer Burns, Jennifer Keller and Lenora A. Pluchino

Management of febrile neutropenia (FN) is an integral part of supportive care for patients undergoing cancer treatment. The NCCN Guidelines for Hematopoietic Growth Factors provide suggestions for appropriate evaluation, risk determination, prophylaxis, and management of FN. These NCCN Guidelines are intended to guide clinicians in the appropriate use of growth factors for select patients undergoing treatment of nonmyeloid malignancies. These NCCN Guidelines Insights highlight important updates to the NCCN Guidelines regarding the incorporation of newly FDA-approved granulocyte-colony stimulating factor biosimilars for the prevention and treatment of FN.