“Lymphoid Tissues (Lymphatic Tissues)”  

Lymphoid Tissues

  In our body's endocrine system, Lymphoid Tissues (Lymphatic Tissues) are the specialized tissues and components of the lymphatic system, that provide fixed locations within the body, which form a variety of lymphocytes so they may mature and multiply, interconnected by a network of lymphatic vessels.

Lymphatic Tissues

  The lymphoid tissues (lymphatic tissues) includes:

• adenoids
• lymph nodes
  • germinal center
  • sentinel lymph node
• palatine tonsils (tonsils)
• peyer's patches
• spleen
• thymus gland
• tertiary lymphoid structures

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“Adenoids (Pharyngeal Tonsils)”  

Adenoid (Nasopharyngeal Tonsil)

  In our body's upper pharynx (throat), the Adenoids (Pharyngeal Tonsils), a lymphoid tissue collection of lymphoid nodules in the waldeyer's tonsillar ring (waldeyer ring), located on the posterior wall and roof of the nasopharynx is a prominence, produced by a mass of lymphoid tissue, best marked in childhood. **

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“Lymph Nodes (Lymphoid Nodules)”  

Lymph Nodes

  In our body's lymphatic organ system, the Lymph Nodes (nodus lymphoideus) are small bean-shaped structures located throughout the system, usually less than 2.5 cm in length.

Regional Lymph Nodes

  In our body's lymphatic organ system, the anatomical regions of Lymph Nodes are:
Lymph nodes above the diaphragm:

• Waldeyer's Tonsillar Ring (Waldeyer Ring)
• Tonsils, adenoids (nasopharynx), lingual tonsils
• Cervical[neck] (occipital, submental, preauricular, submandibular, internal jugular)
• Infraclavicular
• Supraclavicular (scalene)
• Axillary, pectoral
• Mediastinal (peritracheal, thymic region)
• Hilar
• Epitrochlear, brachial

Lymph nodes below the diaphragm include:

• Upper abdomen (splenic hilar, celiac, porta hepatis)
• Lower abdomen (iliac,
• paraaortic, retroperitoneal, mesenteric, abdominal, NOS)
• Iliac
• Inguinal
• Femoral
• Popliteal
• spleen

The lymph nodes includes:

• germinal center
• sentinel lymph node

  Examples of subsets, concepts, subjects and related entities of lymph nodes include:

• Lymph node of limb
  • Lymph node of upper limb
  • Lymph node of lower limb
• Craniocervical lymph node
• Lymph node of body proper
• Visceral lymph node of abdomen
• Parietal lymph node of abdomen
• Lymph node of head
• Deep lymph node
• Superficial lymph node

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“Tertiary Lymphoid Structures”  

  A Tertiary Lymphoid Structure (aka tumor-induced bronchus-associated lymphoid tissue) is an anatomical pathological condition consisting of an aggregate of immune cells formed near the sites of chronically inflamed, infected, or tumorous tissues.
  Tertiary Lymphoid Structures is mostly composed of T cells and of mature dendritic cells (DC) located in the T cell rich areas closed to a B-cell follicle **

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