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Primary Lymphoid Organs

Primary Lymphoid Organs

Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...

Lymphoid Cells and Tissues

Lymphoid Cells and Tissues

Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...

Secondary Lymphoid Organs

Secondary Lymphoid Organs

Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...

Cells of the Adaptive Immune Response

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...

Disorders of Leukocytes

Disorders of Leukocytes

Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune system...

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Related Experiment Video

Updated: Jul 8, 2026

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

Published on: March 30, 2018

[Splenic marginal zone B cell lymphomas].

M M Ott¹, H K Müller-Hermelink

¹Institut für Pathologie, Caritas-Krankenhaus Bad Mergentheim, Bad Mergentheim. michaela.ott@ckbm.de

|January 25, 2008

Summary

This summary is machine-generated.

Splenic marginal zone B cell lymphomas (SMZBCL) are rare lymphoid neoplasms. Research confirms SMZBCL as a distinct entity, with molecular features influencing clinical outcomes.

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Area of Science:

Hematology
Oncology
Molecular Biology

Context:

Splenic marginal zone B cell lymphomas (SMZBCL) are rare lymphoid neoplasms.
Typically involve spleen, bone marrow, and peripheral blood; generalized lymphadenopathy is uncommon.
Association with chronic hepatitis C suggests a role for antigenic stimulation.

Purpose:

To confirm SMZBCL as a distinct tumor entity.
To investigate molecular features and their correlation with clinical course.

Summary:

SMZBCL exhibit distinct clinicopathological features.
Molecular findings include IgVH gene somatic hypermutation (approx. 50%) and 7q deletions (45%).
Gene profiling confirms a homogeneous expression profile, supporting SMZBCL as a distinct entity.

Impact:

Identifies molecular features, such as unmutated IgVH genes and 7q deletions, associated with aggressive clinical courses.
Provides insights into the pathogenesis of SMZBCL, particularly in HCV-associated cases.
Contributes to understanding the heterogeneity of SMZBCL and informs potential therapeutic strategies.