The Breast Flashcards
what is each lobule in the breast drained by?
lactiferous duct
what tissue makes up the nipple?
> collagenous dense
elastic fibres
bands of smooth muscle
what is the anatomical extension of the breast?
> sternal edge to midaxillary line
2/3rd -6th rib
axillary tail extends towards the axillary fossa
what does the retromammary space help with?
movement
what attaches the breast to the dermis?
the suspensory ligament of cooper
what does a third of the breast lie over?
the serratus anterior
what does 2/3rds of the breast lie over?
the pectoral fascia covering the pectoralis muscle
describe the development of the breast
mammary crest or ridges appear during the 4th week then they extend from the axillary region to the inguinal region and usually disappear except in the pectoral region.
what nerves supply the breasts?
anterior and lateral cutaneous branches of the 4th-6th intercostal nerves
what is the blood supply of the breast?
> intercostal arteries
axillary artery
internal thoracic artery
75% of lymph from the lateral quadrants drain to what lymph nodes?
axillary lymph nodes
where does lymph from the medial quadrants drain to?
> parasternal nodes
> opposite breast
what is used to locate the sentinal node?
radiolabelled colloid
describe the breast pre-puberty
> little branching the ducts
> slight enlargement due o fibrous stroma and fat growth
describe breasts during puberty
> branching of the lactiferous ducts
solid spherical masses of glandular polyhedral cells
accumulation of lipids in the adipocytes
