Anatomical Classification of Axillary Lymph Nodes and Their Drainage Regions
Apical Group: Connection to the Subclavian Lymphatic System
Axillary lymph nodes are categorized based on their anatomical location and lymphatic drainage pathways. The apical group connects directly to the subclavian lymphatic system, playing a vital role in systemic drainage.
Anatomical Classification of Axillary Lymph Nodes and Their Drainage Regions
Overview
The axillary lymph nodes play a crucial role in the lymphatic drainage of the upper limbs, breast, and thoracic region. They are classified based on their anatomical location and drainage pathways.
Groups of Axillary Lymph Nodes
1. Apical Group
The apical group is located at the apex of the axilla and receives lymph from all other axillary nodes. It connects directly to the subclavian lymphatic system, making it a crucial pathway for systemic lymphatic drainage.
2. Central Group
Positioned centrally within the axilla, this group collects lymph from the pectoral, subscapular, and humeral nodes before transporting it to the apical nodes.
3. Pectoral (Anterior) Group
Situated along the lateral border of the pectoralis major muscle, these nodes primarily drain the anterior thoracic wall and breast.
4. Subscapular (Posterior) Group
Located along the posterior axillary fold, these nodes collect lymph from the posterior thoracic wall and scapular region.
5. Humeral (Lateral) Group
Found along the axillary vein, this group drains lymph from the upper limb.
Clinical Significance
The classification and function of axillary lymph nodes are essential in clinical diagnostics, particularly in breast cancer staging and treatment planning.
Conclusion
Understanding the anatomical classification of axillary lymph nodes enhances medical diagnosis and treatment strategies, especially for lymphatic disorders and oncological conditions.
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