Introduction In 55% to 75% of gastrointestinal (GI) lymphomas, the stomach is the primary site. Lymphoma accounts for 1% to 7% of all gastric malignancies. , Diffuse large B-cell lymphoma and extranodal marginal-zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma)…
The spectrum of lymphomas encountered in extranodal sites differ from those encountered in lymph nodes ( Tables 61-1 and 61-2 ). Many of the lymphomas that involve extranodal sites are described as specific pathologic entities in other chapters. This chapter…
Definition Follicular lymphoma (FL) is defined in fourth edition of the WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues as a neoplasm composed of follicle center (germinal center) B cells (typically both centrocytes and centroblasts) that usually has at…
Lymph nodes play an important role in reaction to infectious processes. In many cases the histologic changes are nonspecific and a particular etiology cannot be assigned; in other cases the findings are characteristic of specific entities. This chapter focuses on…
Introduction Substantial advances in the diagnosis and classification of lymphoid, myeloid, and histiocytic neoplasms have been made in recent years. Dramatic improvements in genetic techniques have led to recognition of the underlying genetic abnormalities in many of these neoplasms, opening…