Anatomy Of The Breast Flashcards
The skin of the breast (excluding the areola and nipple), drains radially.
- Which 2 sets of lymph nodes, drain the skin of the breast?
- Parasternal lymph nodes
2. Axillary lymph nodes
The skin of the breast (excluding the areola and nipple), drains radially.
- Describe the drainage of the skin of the breast.
PARASTERNAL LYMPH NODES
- Afferent: Skin on medial side of the breast
- Efferent: Bronchomediastinal LN -> Into jugular lymphatic trunk
Into Right lymphatic duct or thoracic duct on the left
AXILLARY LYMPH NODES
- Afferent: Skin on lateral side of the breast
- Efferent: Bronchomediastinal LN -> Into jugular lymphatic trunk
Into Right lymphatic duct or thoracic duct on the left
Lymphatic drainage of the mammary tissue:
- How are the areola’s, nipples and lobules drained?
Via the subareola plexus draining into the:
- Pectoral/ Anterior lymph nodes.
Lymphatic drainage of the mammary tissue:
- How is the medial border of the mammary tissue drained?
- Mention which vessel this lymph runs with.
Parasternal lymph nodes
- Runs with the internal thoracic artery.
Lymphatic drainage of the mammary tissue:
- How is the inferomedial border of the mammary tissue drained?
Drained via the sub-peritoneal and pelvic lymph nodes
Lymphatic drainage of the mammary tissue:
- How is the 75% of the mammary tissue drained?
The axillary tail.
Name the 7 lymph nodes of the breast:
- Apical/ Infraclavicular
- Deltopectoral
- Axillary
- Pectoral/ Anterior
- Central
- Parasternal
- Subscapular/ Posterior
Name the structures associated with the 7 lymph nodes of the breast:
- Apical/ Infraclavicular
- Proximal axillary vein - Delto-pectoral
- Deltopectoral triangle and cephalon vein
- Humeral/ Lateral group
- Distal axillary vein
- Pectoral/ Anterior
- Lateral thoracic artery/ vein
- Central
- Intercostobrachial nerve.
- Parasternal
- Internal thoracic artery
- Subscapular/ Posterior
- Sub-scapular veins
Surface anatomy:
- Where is the breast found in the vertical plane?
Between 2nd and 6th rib
- Midclavicular line
Surface anatomy:
- Where is the breast found in the horizontal plane?
- Parasternal
- 2/3rds on pectorals major
- 1/3rd on stratus anterior.
Surface anatomy:
- What is the inferomedial quadrant of the breast?
On external oblique
- On aponeuresis .
Where is the nipple located?
4th ICS MCL
Are the tubulo-alveolar glands found in the deep or superficial fascia?
Superficial fascia
Organize the following:
- Nipple
- Lactiferous sinus
- Alveoli ductules
- Lactiferous duct
- Lactocytes.
Lactocytes -> Alveoli ductules -> Lactiferous duct -> Lactiferous sinus -> Nipple
Name 3 structures found in the adipose tissue
- Arteries and veins
- Lymphatics
- Nerves
Which quadrant of the breast is Coopers ligament found?
Upper Superior quadrant
What structures provide support in the breast?
- Interlobular connective tissue -> Lobule divisions: Forming septae.
- Coopers ligament
Name 3 important components of the areola:
Sebaceous glands
Seat glands
Glands of Montgomery
Which structure terminates in the nipple.
Lactiferous ducts
- Continue forming lactiferous sinuses.
Name the 3 main arteries involved in the blood supply to the breast:
- State the branches of these arteries are involved in the blood supply.
- Axillary artery
- Lateral thoracic artery
- Thoracoacromial - Internal thoracic artery
- Perforating branches - Intercostal artery branches
- Lateral branches
What is the nerve supply of the breast?
The breast receives both sympathetic (secretory) and sensory innervation:
T2 - T6 derived from lateral and anterior cutaneous branches
What is the innervation of the nipple?
4th ICN
Name 7 variations that can be found in breast study!
- Supernumerary (Third breast)
- Accessory breast tissue found in the axilla.
- Single/ Multiple
- Absence of breast
- Absence of pectoralis major
- Painful for menstruation
- Symmetrical/Asymmetrical
