Breasts Flashcards
.What are the three components of the breast?
1) Mammary Glands
2) Fat
3) Fibrous Tissue
T/F: The the breast is dermally derived?
False: It is epideramally Derived
The breast is located where?
- Between the 2nd and 6th intercostal space
- between the sternum and midaxillary line
What is the vertical line dividing the armpit into anterior and posterior halves?
Midaxillary Line
In what intercostal space is the nipple typically located?
4th
What is the ring of pigmented skin surrounding the nipple?
Areola
What is the portion fo the breast that extends posterior into the armpit?
Axillary Tail/Process
What is cliniclly significant about the axillary tail?
It is often a site for cancer development
What is the strong, fibrous septa that supports the breast?
Suspensory Ligamnts
Where do the suspensory ligaments run?
From the skin of the breast to the deep layer of the superficial fascia
T/F: The mammary gland is a modified sweat gland?
True
Where is the mammary gland located?
Within the superficial fascia
How many lobes does each mammary gland usually contain?
15-20
T/F: All of the lobes of the mammary gland come together to have one main lactiferous duct?
False: They will each have their own
What is the expansion of the lactiferous duct that serves as a reservoir for milk during lactation?
Lactiferous Sinus
The blood supply to the breasts comes from what major artery before branching?
Axillary Artery
The direct blood supply to the breast comes from what arteries?
1) Internal Thoracic Artery
2) Thoracoarcromial Artery
3) Lateral Throacic Artery
4) Intercostal Arteries
What is the major function of the lymphatics of the breast?
To keep infection from reaching the breast tissue(to that way the child when nursing is not effected by infection)
Which lymph nodes will drain the majority of the breast tissue?
Axillary Nodes
The axillary nodes drain how much of the lymph from the breast tissue?
75%
T/F: The lymphatic system of both breasts are interconnected and thus nodes from the opposite breast will work to drain the other side.
True
What is the most common cancer in women?
Breast Cancer
Where will breast cancer spread 1st before entering the blood stream?
The lymphatics of the breast
How is breast cancer “staged?”
By the number of lymph nodes effected
Which node will be the 1st to be effected when breast cancer occurs?
Axillary nodes
-because of the large amount of drainage that is does
How could breast cancer spread to the blood stream?
The drainage from the posterior intercostal veins, then into the azygous and hemiazygous systems
Where is the most common site of breast cancer development and obvious palpation?
In the axillary tail/process
What are the major clinical signs of breast cancer?
1) dimpling of the skin
2) leathery appearance of the skin
3) inversion of the nipple
What would cause dimpling of the skin in breast cancer?
The invasion of the sespensory ligamnets
What would cause the leathery appearance of the skin in breast cancer?
Invasion of the dermis by the neoplasm
What would cause the inversion of the nipple associated with breast cancer?
Invasion of the lactiferous ducts
How would breast cancer be noticed by the chiropractor?
Breast cancer is one cause of mid-thoracic pain in women
