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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...
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.
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...
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...
Lymphoid Cells and Tissues01:18

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...

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Related Experiment Video

Updated: Jul 2, 2026

Dissection and 2-Photon Imaging of Peripheral Lymph Nodes in Mice
16:48

Dissection and 2-Photon Imaging of Peripheral Lymph Nodes in Mice

Published on: August 23, 2007

[Cervical lymph nodes].

O Monnet1, F Cohen, T Lecorroller

  • 1Service d'imagerie médicale adulte, Pr JM Bartoli et Pr G Moulin, Centre Hospitalier, Universitaire La Timone, 254 rue Saint Pierre, 13385 Marseille cedex 5, France. olivier.monnet@ap-hm.fr

Journal De Radiologie
|September 6, 2008
PubMed
Summary
This summary is machine-generated.

Imaging is crucial for head and neck cancer care. Computed tomography (CT) is the primary tool, while MRI and PET-CT offer valuable, though less accessible, insights for diagnosis and treatment monitoring.

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Modified Radical Neck Dissection for Cervical Metastasis
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Modified Radical Neck Dissection for Cervical Metastasis

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Related Experiment Videos

Last Updated: Jul 2, 2026

Dissection and 2-Photon Imaging of Peripheral Lymph Nodes in Mice
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Published on: August 23, 2007

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Area of Science:

  • Radiology
  • Oncology
  • Medical Imaging

Background:

  • Imaging is essential for diagnosing and managing patients with cervico-facial (head and neck) cancers.
  • Radiologists require thorough knowledge of lymph node anatomy and malignant signs.

Observation:

  • Computed tomography (CT) is the preferred initial imaging modality due to its reliability, accessibility, and ability to assess the upper aerodigestive tract.
  • Ultrasound offers high accuracy and enables fine-needle aspiration but provides limited neck visualization.
  • Magnetic resonance imaging (MRI) is not typically a first-line choice, but newer sequences show promise.
  • Positron emission tomography-CT (PET-CT) aids in post-treatment assessment and potentially initial staging, despite limited availability.

Findings:

  • CT remains the gold standard for initial head and neck cancer imaging.
  • Ultrasound is valuable for targeted biopsies.
  • Advanced MRI sequences and PET-CT have specific roles in staging and monitoring.

Implications:

  • Optimal imaging strategies are vital for accurate diagnosis and effective treatment planning in head and neck oncology.
  • Understanding the strengths and limitations of different imaging modalities ensures comprehensive patient care.
  • Future research may enhance the role of MRI and PET-CT in routine clinical practice.