Thorax Flashcards
Which ribs do the breast extend vertically across
R2-6 or 7
What are lactiferous ducts
15-20 ducts that drain individual lobes and empty to the nipple, separated by septa
What is the lactiferous sinus
dilated region in each lactiferous duct
–milk accumulates here during nursing
What is the retromammary space
located behind the breast, but anterior to pectoralis major
– allows breast to have movement over muscles
What is the suspensory ligament
ligament from clavicle and clavipectoral fascia branching out through and around breast tissue to the dermis of the skin overlying the breast
What is the axillary tail
part of the breast that extends into axilla
What is the areola
pigmented area around the nipple
What is located in the areola
oil secreting ducts to help with chaffing and irritation during nursing
What level does the nipple sit at
4th intercostal space
What arteries supply the breast
anterior and posterior intercostal aa
Thoracoacromial trunk
Internal Thoracic a
Lateral thoracic a
Where does the venous system of the breast drain to
Drains into the superior vena cava or azygos system
Where does lymph of the lateral breast drain to and how much drainage does it account for
75% drains to the pectoral nodes, then to the axillary nodes
Where does the lymph of the medial breast drain to
parasternal nodes, or opposite breast–how cancer spreads to the other breast
Where does the lymph of the inferior breast drain to
Abdominal nodes
What is the most prevalent type of breast cancer
adenocarcinomas of the glandular epithelium of mammary gland ducts
