Nerve / Lymphatics Of The Breast Flashcards
Secretory activity of the breast is mainly controlled by what 2 hormones?
- Ovarian
- Pituitary
Where does the primary lymphatic drainage of the breast occur?
Along the inferior border of the pectoralis major muscle from the posterior intercostal nodes to the axillary nodes
- via the axillary tail of the breast
- 75%
Where does the secondary lymphatic drainage of the breast occur?
Through the nodes located medially in the internal mammary chain along the inner aspect of the breast behind the sternum
- 20-25%
What is the least important route for lymphatic drainage in the breast?
Through subcutaneous nodes along the inferomedial aspect of the breast
- 5%
What chain forms the main channel of lymphatic drainage from the breast?
Axillary chain
What are the 8 lymph node groups that make up the axillary chain?
- External mammary
- Scapular
- Axillary
- Central
- Subclavicular
- Interpectoral (Rotter)
- Internal mammary
- Supraclavicular in the supraclavicular fossa
Where do you find the external mammary nodes?
Along the lateral thoracic vessels
Where do you find the scauplar nodes?
Along the subscapular vessels
Where do you find the axillary nodes?
Lateral part of the axillary vessels
Where do you find the central nodes?
Medial part of the axillary vessles
Where do you find the subclavicular nodes?
Along the subclavicular vessels
Where do you find the interpectoral (Rotter) nodes?
Between the pectoralis major and minor muscles
Where do you find the internal mammary nodes?
Along the internal mammary vessels
What are the 3 groups that axillary nodes can be divided into?
- Level 1 (low)
- Level 2 (middle)
- Level 3 (upper or apical)
What is does level 1 group mean in regards to the axillary nodes?
Nodes that are located lateral to the pectoralis minor muscles
