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Related Concept Videos

Primary Lymphoid Organs01:16

Primary Lymphoid Organs

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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...
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Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

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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...
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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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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...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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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...
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Functions of the Lymphatic and Immune System01:28

Functions of the Lymphatic and Immune System

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The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
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Peripheral Nervous System: Ganglia and Nerves01:24

Peripheral Nervous System: Ganglia and Nerves

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The Peripheral Nervous System (PNS) is a crucial component of the body's neural network, extending beyond the central nervous system (CNS) to bridge the gap between the CNS and the external environment. It encompasses nerves, ganglia, and sensory receptors.
Nerves
The nerve is a bundle of axons that serves as the communication highway in the PNS. Each nerve is ensheathed in a protective layer of connective tissue called the epineurium. This outermost layer safeguards the nerve and supports the...
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Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma
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Primary central nervous system lymphoma.

Andrés J M Ferreri1, Teresa Calimeri2, Kate Cwynarski3

  • 1Lymphoma Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy. ferreri.andres@hsr.it.

Nature Reviews. Disease Primers
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This summary is machine-generated.

Primary central nervous system lymphoma (PCNSL) is a rare brain cancer. Current treatments are challenging, with many patients experiencing relapse, highlighting the need for improved therapies.

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Area of Science:

  • Neuro-oncology
  • Hematology
  • Immunology

Background:

  • Primary central nervous system lymphoma (PCNSL) is a type of diffuse large B cell lymphoma exclusively affecting the brain, spinal cord, leptomeninges, and/or eyes.
  • Its pathophysiology involves immunoglobulin binding to CNS self-proteins and altered signaling pathways (B cell receptor, Toll-like receptor, NF-κB), with contributions from immune cells and cytokines.
  • Clinical presentation is diverse, depending on the specific CNS regions involved.

Purpose of the Study:

  • To provide a comprehensive overview of Primary central nervous system lymphoma (PCNSL).
  • To discuss current understanding of PCNSL pathophysiology, clinical presentation, and standard treatment approaches.
  • To highlight challenges in treatment, including response rates, relapse, and the need for further research.

Main Methods:

  • Review of existing literature on Primary central nervous system lymphoma (PCNSL).
  • Analysis of current standard-of-care protocols, including chemotherapy, stem cell transplantation, and radiotherapy.
  • Discussion of factors influencing treatment decisions for different patient groups.

Main Results:

  • Standard treatment involves methotrexate-based polychemotherapy followed by autologous stem cell transplantation or radiotherapy.
  • A significant proportion of patients (15-25%) show no response to chemotherapy, and 25-50% relapse after initial response.
  • Relapse rates are higher in older patients, and the prognosis after relapse is generally poor, irrespective of age.

Conclusions:

  • Despite current treatments, PCNSL poses significant challenges due to treatment resistance and high relapse rates.
  • Further research is crucial for identifying diagnostic biomarkers, developing more effective and less neurotoxic therapies, and exploring novel treatment strategies like immunotherapies and adoptive cell therapies.
  • Improving drug penetration into the central nervous system (CNS) remains a critical area for therapeutic advancement.