Breast disease Flashcards
Woman’s lifetime chance of developing invasive breast cancer over lifetime?
1/8
Breast parenchyma
mammary glands with 20-40 lobules that drain into lactiferous ducts which go to the nipple
Major blood supply to breast
Internal mammary (off internal thoracic) and lateral thoracic
Node drainage
97% axillary 3% internal mammary
Breast innervation
intercostobrachial nerve- sensation of upper medial arm
Long thoracic nerve- serratus anterior
Thoracodorsal
Lateral pectoral
Hormones that promote breast development?
Estrogen- ductal development and fat deposition
Progesterone- promotes lobular-alveolar (stromal) development that makes LACTATION possible
Prolactin- milk production
Oxytocin- milk letdown
Average risk woman screening guidelines?
Clinical breast evaluation 1-3 yrs above age 20.
Annually after age 40.
Screening mammography starting at age 40. No upper limit.
High risk woman screening guidelines?
Clinical breast exam every 6-12 months
Annual mammography starting at age 25 or 5-10 yrs before the age of the youngest cancer diagnosis in the family.
Interval breast MRIs along with their annual mammogram.
When is ultrasound used for breast evaluation?
- For uncertain mammographic findings
- Premenopausal women (and under 40)
- Women with dense breast tissue
- Guiding needle for breast biopsy
- DISTINGUISHING CYST VS. SOLID MASS
What is digital mammography better than film mammography for?
Women with dense breasts
Women younger than 50
Premenopausal or perimenopausal
Mastalgia associations
Premenstrual symptom
HRT
Pregnancy
Fibrocystic change
What do you use to evaluate focal lesions in areas of trauma?
Ultrasound
If at high risk of cancer you should do mammography for breast pain.
FDA approved medication for mastalgia?
Danazol ONLY. Many side effects.
NSAIDs, supportive bra, warm and cool compresses.
MCC bloody nipple discharge?
Intraductal papilloma
Worrisome cause of bloody nipple discharge?
Invasive papillary carcinoma
Galactorrhea causes?
Pregnancy, pituitary adenoma, hypothyroidism, stress, meds like OCPs, antihypertensives, PSYCH DRUGS.
TRH causes TSH and prolactin release. TRH is elevated in hypothyroidism (trying to get TSH to stim the thyroid) so there’s also too much prolactin release.
What do you do with bloody nipple discharge?
Test on guaiac card
Send for cytologic eval
Serous discharge cause?
Normal menses, OCPs, fibrocystic change, early pregnancy
Yellow-tinged discharge cause?
Fibrocystic change or galactocele
Green, sticky discharge cause?
Duct ectasia
lactiferous duct becomes blocked or clogged.
Signs of duct ectasia can include nipple retraction, inversion, pain,[5] and sometimes bloody discharge.
What percent of nipple discharge is associated with underlying malignancy?
5%
The most concerning associated sx with nipple discharge?
Happens spontaneously, bloody or serosanguinous, unilateral, persistent, single duct involvement, associated with a mass
Purulent discharge cause?
Superficial or central breast abcess
Treatment of nipple discharge?
Most is benign and requires no treatment
How often does mammography pick up a new breast cancer?
Misses it 10-15% of the time!