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Breast (Internal structure
Internal-Structure-of-the-Breast (Mammary…
Breast
Internal structure
Connective tissue stroma
Supporting fibrous and fatty tissue
Fibrous forms the suspensory ligaments (of Cooper)
- Attach/secure breasts to the dermis/pectoral fascia
- Separate the breast lobules
Pectoral fascia
Flat sheet of connective tissue assoc with pec major
Attachment point for the suspensory ligaments
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Retromammary space
Loose connective tissue between breast and pec fascia
Potential space - important in reconstruction
Lymphatics
Breast tissue
1, Axillary nodes
Recieve most lymph from breast
Five groups (central, lateral, pectoral, apical, posterior)
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Skin
- Axillary nodes
- Anterior deep cervical
- Infraclavicular
Nipple/areola
- Subareolar lymph plexus
Surface anatomy
Regions
Circular body
Largest, most prominent part
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Features
Areola
Pigmented area of skin
Multiple glands:
1. Sebaceous glands - secrete oily lubricant
in pregnancy to protect the nipple
2. Sweat glands
3. Mammary glands
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Breast
Location
Anterior abdo wall
Horizontal: lateral border of sternum to mid axilla
Vertical: 2nd-6th ICS
Depth: superficial to pec major and serratus anterior
Vasculature
Arterial
Medial breast
- Internal mammary (branch of subclavian)
Lateral breast
- Lateral thoracic (branch of axillary)
- Thoracoacromial (brach of axillary)
- Lateral mammary (branch of posterior intercostals)
- Mammary (branch of anterior intercostal)
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