Chapter 5

Geographic Distribution of the Peripheral T-cell Lymphomas

Global Epidemiology

Amulya Yellala

Amulya Yellala

Division of Oncology-Hematology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA

Search for more papers by this author
Avyakta Kallam

Avyakta Kallam

Division of Oncology-Hematology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA

Search for more papers by this author
James O. Armitage

James O. Armitage

Division of Oncology-Hematology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA

Search for more papers by this author
First published: 19 February 2021

Summary

The T-cell lymphomas are characterized by marked differences in its global patterns of distribution. The epidemiology and classification of non-Hodgkin lymphoma (NHL) has undergone vast transformation over the past few decades. In an attempt to study the geographical distribution of NHL subtypes, the International NHL Classification Project was conducted in the late 1990s. The 2017 WHO classification broadly divides peripheral T-cell lymphomas (PTCL) into three categories based on their location. They are leukemic (disseminated), nodal, and extranodal. These categories are further subdivided based on morphology, immunohistochemistry, and clinical behavior. Examples of these lymphomas include PTCL not otherwise specified (PTCL-NOS), angioimmunoblastic T-cell lymphomas, anaplastic large-cell lymphoma (ALCL), anaplastic lymphoma kinase positive (ALK+), ALK negative (ALK–) ALCL, intestinal T-cell lymphoma, and breast implant-associated ALCL. This chapter discusses the epidemiological data for each of the individual subtype of PTCL.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.