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Related Concept Videos

Detailed Structure and Function of Lymph Nodes01:23

Detailed Structure and Function of Lymph Nodes

Lymph nodes are bean-shaped structures that cluster along the lymphatic vessels in the inguinal, axillary, and cervical regions. Each node is divided into compartments by a capsule that extends trabeculae inward.
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
Secondary Lymphoid Organs01:15

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...
Development of the Lymphatic System01:15

Development of the Lymphatic System

The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
Lymphatic Vessels and Lymph Transport01:16

Lymphatic Vessels and Lymph Transport

Lymphatic vessels, known as lymphatics, are crucial in transporting lymph from peripheral tissues to our venous system. This process begins with lymph entering through tiny capillaries that branch through tissues. These capillaries have unique features such as larger diameters, thinner walls, and a distinctive one-way valve system formed by overlapping endothelial cells.
This one-way system allows fluids, solutes, and even pathogens to enter but prevents their return to the intercellular spaces.
Primary Lymphoid Organs01:16

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...
Veins of Head and Neck01:19

Veins of Head and Neck

The blood drainage from the head and neck is primarily managed by three pairs of veins: the external jugular, internal jugular, and vertebral veins. The external jugular veins drain superficial scalp and face structures, passing over the sternocleidomastoid muscles to empty into the subclavian veins.
On the other hand, the vertebral veins, unlike their arterial counterparts, are not primarily responsible for brain drainage. Instead, they drain the cervical vertebrae, spinal cord, and some small...

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Related Experiment Video

Updated: Jul 6, 2026

Cervical Lymph Duct-Cannulated Rat Model for Assessing Lymphatic Transport from the Head and Brain
08:03

Cervical Lymph Duct-Cannulated Rat Model for Assessing Lymphatic Transport from the Head and Brain

Published on: March 10, 2026

Cervical lymph nodes.

Martin G Mack1, Jörg Rieger, Mehran Baghi

  • 1Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Johann Wolfgang Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt/Main, Germany. martinmack@arcor.de

European Journal of Radiology
|March 14, 2008
PubMed
Summary
This summary is machine-generated.

Accurate lymph node staging is crucial for head and neck cancer treatment. New MRI techniques with contrast agents show promise for improved lymph node assessment, overcoming limitations of traditional size criteria.

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Cervical Lymph Duct-Cannulated Rat Model for Assessing Lymphatic Transport from the Head and Brain
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Collection and Processing of Lymph Nodes from Large Animals for RNA Analysis: Preparing for Lymph Node Transcriptomic Studies of Large Animal Species
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Modified Radical Neck Dissection for Cervical Metastasis

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Area of Science:

  • Oncology
  • Radiology
  • Medical Imaging

Background:

  • Lymph node staging is vital for head and neck cancer prognosis and treatment selection.
  • Current imaging criteria like node size and necrosis have limitations and variability.
  • Traditional size-based assessment of head and neck lymph nodes has not significantly advanced.

Purpose of the Study:

  • To review advancements in MRI for diagnosing lymph node metastases in head and neck cancer.
  • To highlight the potential of new contrast agents and techniques like diffusion-weighted imaging (DWI).
  • To address the unreliability of size criteria in lymph node assessment.

Main Methods:

  • Review of high-resolution MRI sequences and specific contrast agents, including Ultrasmall Superparamagnetic Iron Oxide particles (USPIOs).
  • Discussion of signal changes on T2-weighted MR images after USPIO administration.
  • Focus on MRI with new contrast agents and diffusion-weighted imaging (DWI).

Main Results:

  • USPIOs cause signal decrease in benign lymph nodes on T2-weighted MR images.
  • Malignant lymph nodes typically do not show a significant signal decrease after USPIO administration.
  • Promising results from initial clinical studies using these new MRI techniques.

Conclusions:

  • New MRI techniques and contrast agents offer improved diagnostic possibilities for head and neck lymph nodes.
  • These advanced methods can potentially overcome the limitations of conventional size-based criteria.
  • Further research and application of MRI with USPIOs and DWI are warranted for accurate lymph node staging.