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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.
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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.
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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.
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Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma
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Intravascular Large B-cell Lymphoma With Multisystem Involvement.

Dinghu Weng1,2,3, Ping Gao4

  • 1Department of Medical Imaging, Zhongnan Hospital of Wuhan University.

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|July 1, 2025
PubMed
Summary

Intravascular large B-cell lymphoma (IVLBCL) is a rare cancer. 18F-FDG PET/CT imaging effectively identified IVLBCL lesions in multiple organs, aiding diagnosis when conventional methods failed.

Keywords:
PET/CTintravascular large B-cell lymphoma

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Area of Science:

  • Hematology
  • Oncology
  • Radiology

Background:

  • Intravascular large B-cell lymphoma (IVLBCL) is a rare hematologic malignancy.
  • Neoplastic lymphoid cells proliferate within small and medium-sized blood vessels.
  • Diagnosis is challenging due to atypical presentations.

Purpose of the Study:

  • To describe a case of IVLBCL with multisystem involvement.
  • To highlight the diagnostic utility of 18F-FDG PET/CT in IVLBCL.
  • To underscore the role of 18F-FDG PET/CT as a clinical tool.

Main Methods:

  • Case report of a patient with IVLBCL.
  • Utilized 18F-FDG PET/CT for lesion detection.
  • Compared findings with conventional imaging.

Main Results:

  • 18F-FDG PET/CT identified lesions in the brain parenchyma, skull, lungs, and adrenal glands.
  • These sites were not detectable on conventional imaging.
  • Demonstrated multisystem involvement of IVLBCL.

Conclusions:

  • 18F-FDG PET/CT is valuable for diagnosing IVLBCL.
  • This imaging modality can detect lesions missed by conventional methods.
  • 18F-FDG PET/CT is a crucial tool for IVLBCL management.