Ducts Flashcards
How many major ducts do women have that terminate at the nipple?
8-20
What does each major duct composed of?
Collecting duct that connect the ampulla to the nipple
What does the ampulla do in the lactiferous duct system?
Connect major subareolar ducts that divide into segmental ducts
What happens once the ampulla divides the subareolar ducts into segmental ducts?
The it gets divided into terminal duct lobular units
What kind of cells line the inner lumen of the terminal duct lobular units?
Epithelial cells
What kind of cells line the outer lumen of the terminal duct lobular units?
Myoepithelial cells
What is the basic functional unit of the human breast?
Terminal duct lobular unit
It is the target zone?
The site of 50% of precancerous epithelial proliferations
- junction of the intra and extra lobular terminal ducts
What do lactiferous ducts do as they get closer to the nipple?
Enlarge
- get more narrow the further away they are
What plane is the best way to evaluate the lactiferous duct system?
Using radial and antiradial scan planes
What value should ducts non-exceed in a non-lactating patient?
2mm
What opens through the nipple?
Lactiferous ducts
What is a result of pronounced distension of the ductal system?
Ductal ectasia
What often occurs with ductal ectasia? (2)
- Fibrocystic disease
- Mastitis
What is ductal ectasia?
A non-cancerous breast condition that occurs when a milk duct under the nipple widens, thickens, and fills with fluid
