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Presenter : 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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Steven M. Horwitz, Elise A. Olsen, Madeleine Duvic, Pierliugi Porcu and Youn H. Kim

The NCCN Clinical Practice Guidelines in Oncology: Non-Hodgkin's Disease were recently revised to include recommendations for treating mycosis fungoides and Sézary syndrome. These uncommon lymphomas require a specialized evaluation and use a unique TNMB staging system. Unlike the other forms of non-Hodgkin's lymphomas, stage overwhelmingly determines prognosis and defines radically different treatment approaches. For patients with early-stage disease, initial treatment with skin-directed therapies is preferred, and many patients never require systemic therapy. For patients with refractory or advanced-stage disease, biologic therapies are often the first choices, whereas chemotherapies are reserved for later in the disease course. Many milder therapies may be repeated several times in the disease course, and maintenance and tapering strategies are common. This article also discusses the emerging role of allogeneic stem cell transplantation.

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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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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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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.

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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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Andrew D. Zelenetz, William G. Wierda, 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, Susan Krivacic, Ann S. LaCasce, Auayporn Nademanee, Pierluigi Porcu, Oliver Press, Barbara Pro, Nishitha Reddy, Lubomir Sokol, Lode Swinnen, Christina Tsien, Julie M. Vose, Joachim Yahalom, Nadeem Zafar, Mary A. Dwyer and Maoko Naganuma

These NCCN Guidelines Insights summarize several key updates to the NCCN Guidelines for Non-Hodgkin’s Lymphomas (NHL) and provide a discussion of the clinical evidence that support the updates. The updates discussed in this article feature recommendations for additional treatment options in patients with chronic lymphocytic leukemia and guidance surrounding the management of hepatitis virus reactivation/infections in high-risk patients with NHL undergoing antitumor therapy.

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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, 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, Joachim Yahalom, Nadeem Zafar, Mary Dwyer and Hema Sundar

Non-Hodgkin’s lymphomas (NHL) are a heterogeneous group of lymphoproliferative disorders originating in B lymphocytes, T lymphocytes, or natural killer cells. Mantle cell lymphoma (MCL) accounts for approximately 6% of all newly diagnosed NHL cases. Radiation therapy with or without systemic therapy is a reasonable approach for the few patients who present with early-stage disease. Rituximab-based chemoimmunotherapy followed by high-dose therapy and autologous stem cell rescue (HDT/ASCR) is recommended for patients presenting with advanced-stage disease. Induction therapy followed by rituximab maintenance may provide extended disease control for those who are not candidates for HDT/ASCR. Ibrutinib, a Bruton tyrosine kinase inhibitor, was recently approved for the treatment of relapsed or refractory disease. This manuscript discusses the recommendations outlined in the NCCN Guidelines for NHL regarding the diagnosis and management of patients with MCL.

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Andrew D. Zelenetz, Leo I. Gordon, William G. Wierda, Jeremy S. Abramson, Ranjana H. Advani, C. Babis Andreadis, Nancy Bartlett, Naresh Bellam, John C. Byrd, Myron S. Czuczman, Luis E. Fayad, Richard I. Fisher, Martha J. Glenn, 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, Lubomir Sokol, Lode J. Swinnen, Christina Tsien, Julie M. Vose, Joachim Yahalom, Nadeem Zafar, Mary Dwyer and Hema Sundar

Non-Hodgkin’s lymphomas (NHLs) are a heterogeneous group of lymphoproliferative disorders originating in B lymphocytes, T lymphocytes, or natural killer cells. Follicular lymphoma (FL) is the most common subtype of indolent NHL, accounting for approximately 22% of all newly diagnosed cases of NHL. The incorporation of rituximab to chemotherapy regimens has become a widely accepted standard of care for first-line therapy for patients with FL. Maintenance and consolidation therapy with rituximab and radioimmunotherapy have also been associated with improved progression-free survival in patients experiencing response to first-line therapy. Despite therapeutic advances that have improved outcomes, FL is generally considered a chronic disease characterized by multiple recurrences with current therapies. This manuscript discusses the recommendations outlined in the NCCN Guidelines for the diagnosis and management of patients with FL.

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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