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Peripheral T-Cell Lymphomas–Not Otherwise Specified: A Shrinking Entity?

Presented by: Steven M. Horwitz

Peripheral T-cell lymphomas–not otherwise specified (PTCL-NOS) is a broad category of biologically and clinically heterogeneous diseases, which likely does not have a single treatment paradigm. Understanding of subtype-specific approaches is leading to more individualized therapy. There are also therapeutic vulnerabilities to target, such as CD30, JAK/STAT pathway, and epigenetic modifiers, that may cross different histologic subtypes. As new therapies evolve, however, it is important to understand in which situations current standard treatments work, because some of these treatments, such as combination chemotherapy, are potentially curative for a subset of patients. For certain populations, adding to these chemotherapy backbones will produce the best results. For other populations, entirely new approaches may be appropriate. Future treatment advances will, in part, be made by enriching populations based on their likelihood of response to specific therapies and utilizing biomarker-driven or biomarker-informed strategies.

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Non-Hodgkin’s Lymphomas

Andrew D. Zelenetz, Jeremy S. Abramson, Ranjana H. Advani, C. Babis Andreadis, John C. Byrd, Myron S. Czuczman, Luis Fayad, Andres Forero, Martha J. Glenn, Jon P. Gockerman, Leo I. Gordon, Nancy Lee Harris, Richard T. Hoppe, Steven M. Horwitz, Mark S. Kaminski, Youn H. Kim, Ann S. LaCasce, Tariq I. Mughal, Auyporn Nademanee, Pierluigi Porcu, Oliver Press, Leonard Prosnitz, Nashitha Reddy, Mitchell R. Smith, Lubomir Sokol, Lode Swinnen, Julie M. Vose, William G. Wierda, Joachim Yahalom, and Furhan Yunus

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Non-Hodgkin's Lymphomas

Andrew D. Zelenetz, Jeremy S. Abramson, Ranjana H. Advani, C. Babis Andreadis, Nancy Bartlett, Naresh Bellam, John C. Byrd, Myron S. Czuczman, Luis E. Fayad, Martha J. Glenn, Jon P. Gockerman, Leo I. Gordon, Nancy Lee Harris, Richard T. Hoppe, Steven M. Horwitz, Christopher R. Kelsey, Youn H. Kim, Ann S. LaCasce, Auayporn Nademanee, Pierluigi Porcu, Oliver Press, Barbara Pro, Nashitha Reddy, Lubomir Sokol, Lode J. Swinnen, Christina Tsien, Julie M. Vose, William G. Wierda, Joachim Yahalom, and Nadeem Zafar

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NCCN Guidelines Insights: Primary Cutaneous Lymphomas, Version 2.2020

Featured Updates to the NCCN Guidelines

Neha Mehta-Shah, Steven M. Horwitz, Stephen Ansell, Weiyun Z. Ai, Jeffrey Barnes, Stefan K. Barta, Mark W. Clemens, Ahmet Dogan, Kristopher Fisher, Aaron M. Goodman, Gaurav Goyal, Joan Guitart, Ahmad Halwani, Bradley M. Haverkos, Richard T. Hoppe, Eric Jacobsen, Deepa Jagadeesh, Matthew A. Lunning, Amitkumar Mehta, Elise A. Olsen, Barbara Pro, Saurabh A. Rajguru, Satish Shanbhag, Aaron Shaver, Andrei Shustov, Lubomir Sokol, Pallawi Torka, Carlos Torres-Cabala, Ryan Wilcox, Basem M. William, Jasmine Zain, Mary A. Dwyer, Hema Sundar, and Youn H. Kim

Mycosis fungoides (MF) is the most common subtype of cutaneous T-cell lymphoma (CTCL), and Sézary syndrome (SS) is a rare erythrodermic and leukemic subtype of CTCL characterized by significant blood involvement. Although early-stage disease can be effectively treated predominantly with skin-directed therapies, systemic therapy is often necessary for the treatment of advanced-stage disease. Systemic therapy options have evolved in recent years with the approval of novel agents such as romidepsin, brentuximab vedotin, and mogamulizumab. These NCCN Guidelines Insights discuss the diagnosis and management of MF and SS (with a focus on systemic therapy).

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T-Cell Lymphomas, Version 2.2022, NCCN Clinical Practice Guidelines in Oncology

Steven M. Horwitz, Stephen Ansell, Weiyun Z. Ai, Jeffrey Barnes, Stefan K. Barta, Jonathan Brammer, Mark W. Clemens, Ahmet Dogan, Francine Foss, Paola Ghione, Aaron M. Goodman, Joan Guitart, Ahmad Halwani, Bradley M. Haverkos, Richard T. Hoppe, Eric Jacobsen, Deepa Jagadeesh, Allison Jones, Avyakta Kallam, Youn H. Kim, Kiran Kumar, Neha Mehta-Shah, Elise A. Olsen, Saurabh A. Rajguru, Sima Rozati, Jonathan Said, Aaron Shaver, Lauren Shea, Michi M. Shinohara, Lubomir Sokol, Carlos Torres-Cabala, Ryan Wilcox, Peggy Wu, Jasmine Zain, Mary Dwyer, and Hema Sundar

Peripheral T-cell lymphomas (PTCLs) are a heterogeneous group of lymphoproliferative disorders arising from mature T cells, accounting for about 10% of non-Hodgkin lymphomas. PTCL-not otherwise specified is the most common subtype, followed by angioimmunoblastic T-cell lymphoma, anaplastic large cell lymphoma, anaplastic lymphoma kinase–positive, anaplastic large cell lymphoma, anaplastic lymphoma kinase–negative, and enteropathy-associated T-cell lymphoma. This discussion section focuses on the diagnosis and treatment of PTCLs as outlined in the NCCN Guidelines for T-Cell Lymphomas.

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NCCN Guidelines Insights: T-Cell Lymphomas, Version 1.2021

Featured Updates to the NCCN Guidelines

Steven M. Horwitz, Stephen Ansell, Weiyun Z. Ai, Jeffrey Barnes, Stefan K. Barta, Mark W. Clemens, Ahmet Dogan, Aaron M. Goodman, Gaurav Goyal, Joan Guitart, Ahmad Halwani, Bradley M. Haverkos, Richard T. Hoppe, Eric Jacobsen, Deepa Jagadeesh, Allison Jones, Youn H. Kim, Neha Mehta-Shah, Elise A. Olsen, Barbara Pro, Saurabh A. Rajguru, Sima Rozati, Jonathan Said, Aaron Shaver, Andrei Shustov, Lubomir Sokol, Pallawi Torka, Carlos Torres-Cabala, Ryan Wilcox, Basem M. William, Jasmine Zain, Mary A. Dwyer, and Hema Sundar

Hepatosplenic T-cell lymphoma (HSTCL) is a rare subtype of T-cell lymphoma associated with an aggressive clinical course and a worse prognosis. HSTCL develops in the setting of chronic immune suppression or immune dysregulation in up to 20% of cases and is most often characterized by spleen, liver, and bone marrow involvement. Diagnosis and management of HSTCL pose significant challenges given the rarity of the disease along with the absence of lymphadenopathy and poor outcome with conventional chemotherapy regimens. These Guidelines Insights focus on the diagnosis and treatment of HSTCL as outlined in the NCCN Guidelines for T-Cell Lymphomas.

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NCCN Guidelines Insights: Non-Hodgkin's Lymphomas, Version 3.2016

Steven M. Horwitz, Andrew D. Zelenetz, Leo I. Gordon, William G. Wierda, Jeremy S. Abramson, Ranjana H. Advani, C. Babis Andreadis, Nancy Bartlett, John C. Byrd, Luis E. Fayad, Richard I. Fisher, Martha J. Glenn, Thomas M. Habermann, Nancy Lee Harris, Francisco Hernandez-Ilizaliturri, Richard T. Hoppe, Mark S. Kaminski, Christopher R. Kelsey, Youn H. Kim, Susan Krivacic, Ann S. LaCasce, Matthew Lunning, Auayporn Nademanee, Oliver Press, Rachel Rabinovitch, Nishitha Reddy, Erin Reid, Kenneth Roberts, Ayman A. Saad, Lubomir Sokol, Lode J. Swinnen, Julie M. Vose, Joachim Yahalom, Nadeem Zafar, Mary Dwyer, Hema Sundar, and Pierluigi Porcu

Peripheral T-cell lymphomas (PTCLs) represent a relatively uncommon heterogeneous group of non-Hodgkin's lymphomas (NHLs) with an aggressive clinical course and poor prognosis. Anthracycline-based multiagent chemotherapy with or without radiation therapy followed by first-line consolidation with high-dose therapy followed by autologous stem cell rescue (HDT/ASCR) is the standard approach to most of the patients with newly diagnosed PTCL. Relapsed or refractory disease is managed with second-line systemic therapy followed by HDT/ASCR or allogeneic stem cell transplant, based on the patient's eligibility for transplant. In recent years, several newer agents have shown significant activity in patients with relapsed or refractory disease across all 4 subtypes of PTCL. These NCCN Guideline Insights highlight the important updates to the NCCN Guidelines for NHL, specific to the management of patients with relapsed or refractory PTCL.

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Diffuse Large B-Cell Lymphoma Version 1.2016

Andrew D. Zelenetz, Leo I. Gordon, William G. Wierda, Jeremy S. Abramson, Ranjana H. Advani, C. Babis Andreadis, Nancy Bartlett, John C. Byrd, Luis E. Fayad, Richard I. Fisher, Martha J. Glenn, Thomas M. Habermann, Nancy Lee Harris, Francisco Hernandez-Ilizaliturri, Richard T. Hoppe, Steven M. Horwitz, Mark S. Kaminski, Christopher R. Kelsey, Youn H. Kim, Susan Krivacic, Ann S. LaCasce, Matthew Lunning, Auayporn Nademanee, Pierluigi Porcu, Oliver Press, Rachel Rabinovitch, Nishitha Reddy, Erin Reid, Kenneth Roberts, Ayman A. Saad, Lubomir Sokol, Lode J. Swinnen, Julie M. Vose, Joachim Yahalom, Nadeem Zafar, Mary Dwyer, and Hema Sundar

Diffuse large B-cell lymphomas (DLBCL) are now considered a heterogeneous group of distinct molecular subtypes (germinal center B-cell DLBCL, activated B-cell DLBCL, and primary mediastinal large B-cell lymphoma (PMBL) with varied natural history and response to therapy. In addition, a subset of patients with DLBCL have concurrent MYC and/or BCL2 gene rearrangements (double-hit lymphomas; DHL) and others have a dual expression of both MYC and BCL2 proteins (double-expressing DLBCL; DEL). The standard of care for the treatment of patients with PMBL, DHL, or DEL has not been established. Adequate immunophenotyping and molecular testing (in selected circumstances) are necessary for the accurate diagnosis of different subtypes of DLBCL. The NCCN Guidelines included in this issue, part of the NCCN Guidelines for non-Hodgkin's lymphomas, address the diagnosis and management of DLBCL and its subtypes.

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Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma, Version 1.2015

Andrew D. Zelenetz, Leo I. Gordon, William G. Wierda, Jeremy S. Abramson, Ranjana H. Advani, C. Babis Andreadis, Nancy Bartlett, John C. Byrd, Myron S. Czuczman, Luis E. Fayad, Richard I. Fisher, Martha J. Glenn, Thomas M. Habermann, Nancy Lee Harris, Richard T. Hoppe, Steven M. Horwitz, Christopher R. Kelsey, Youn H. Kim, Susan Krivacic, Ann S. LaCasce, Auayporn Nademanee, Pierluigi Porcu, Oliver Press, Rachel Rabinovitch, Nishitha Reddy, Erin Reid, Ayman A. Saad, Lubomir Sokol, Lode J. Swinnen, Christina Tsien, Julie M. Vose, Lynn Wilson, Joachim Yahalom, Nadeem Zafar, Mary Dwyer, and Hema Sundar

Chronic lymphocytic leukemia (CLL) and small lymphocytic lymphoma (SLL) are different manifestations of the same disease, which are managed in the same way. The advent of novel monoclonal antibodies (ofatumumab and obinutuzumab) led to the development of effective chemoimmunotherapy regimens. The recently approved small molecule kinase inhibitors (ibrutinib and idelalisib) are effective treatment options for CLL in elderly patients with decreased tolerance for aggressive regimens and in patients with poor prognostic features who do not benefit from conventional chemoimmunotherapy regimens. This portion of the NCCN Guidelines for Non-Hodgkin’s Lymphomas describes the recent specific to the incorporation of recently approved targeted therapies for the management of patients with newly diagnosed and relapsed or refractory CLL/SLL.

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NCCN Guidelines Insights: T-Cell Lymphomas, Version 2.2018

Steven M. Horwitz, Stephen M. Ansell, Weiyun Z. Ai, Jeffrey Barnes, Stefan K. Barta, Michael Choi, Mark W. Clemens, Ahmet Dogan, John P. Greer, Ahmad Halwani, Bradley M. Haverkos, Richard T. Hoppe, Eric Jacobsen, Deepa Jagadeesh, Youn H. Kim, Matthew A. Lunning, Amitkumar Mehta, Neha Mehta-Shah, Yahurio Oki, Elise A. Olsen, Barbara Pro, Saurabh A. Rajguru, Satish Shanbhag, Andrei Shustov, Lubomir Sokol, Pallawi Torka, Ryan Wilcox, Basem William, Jasmine Zain, Mary A. Dwyer, and Hema Sundar

Natural killer (NK)/T-cell lymphomas are a rare and distinct subtype of non-Hodgkin's lymphomas. NK/T-cell lymphomas are predominantly extranodal and most of these are nasal type, often localized to the upper aerodigestive tract. Because extranodal NK/T-cell lymphomas (ENKL) are rare malignancies, randomized trials comparing different regimens have not been conducted to date and standard therapy has not yet been established for these patients. These NCCN Guidelines Insights discuss the recommendations for the diagnosis and management of patients with ENKL as outlined in the NCCN Guidelines for T-Cell Lymphomas.