Breast Flashcards
Breast overlies the ____ to _____ ribs on the anterior chest wall
2nd to 6th
Breast shape is _______ with an axillary tail of Spence
Hemispherical
Fascia of the breast forms septa called _____ which attach the breast to the skin anteriorly and to the fascia of pectoralis posteriorly. Provides supportive framework between two fascial layers
Cooper’s ligament
Usual level of areola
4th intercostal space
Breast is arranged into _____ lobes, each of which is drained by a single major lactiferous duct that opens on to the nipple
15-20 lobes
Breast parenchyma comprise of
Glandular tissue of the acini and ductal tissue
Breast stroma is composed of
Fat surrounding the parenchymal structures and fibrotic framework
Blood supply to the breast that pierce the intercostal spaces and traverse pectoralis muscle to supply approximately 60% of breast mainlu medial and central
Internal mammary/thoracic artery
Supplies 30% of the breast, mainly upper outer quadrant
Lateral thoracic branch of axillary artery
Supplies 10% of breast tissue
Perforating branches of anterior intercostal arteries
Venous drainage of the breast
Axillary, subclavian and azygos veins
Majority of lymph drainage of the breast goes to the
Axillary chain
Less than 5% of lymph drainage of the breast
Internal mammary chain
Lymph node level that lies lateral to the lateral border of pectoralis minor
Level 1
Lymph node level that lie behind pectoralis minor
Level 2
