Obstetrics and Gynecology Flashcards
(95 cards)
What are the characteristics of breast cancer?
Most common malignancy in women
- risk factors (increased exposure to estrogen)
- menarche before age 12
- old age of first full-term pregnancy, no pregnancies
- menopause after age 52
- breast mass - immobile, irregular
- nipple retraction, bloody nipple discharge
- tumors may be estrogen receptor (ER) positive 75%, progesterone receptor (PR) positive 65% as well as HER2 positive 25%
What is the most common type of breast cancer?
infiltrating intraductal carcinoma (IIC) 80%
- infiltrating lobular (10%) frequently bilateral
- Paget’s disease of the nipple (1%) chronic eczematous itchy, scaling rash on the nipples and areola
- inflammatory breast cancer (2%) red swollen, warm and itchy breast often with nipple retraction and beau d’orange (NO LUMP)
What are the USPSTF guidelines for breast cancer screening?
- baseline mammogram every 2 year from age 50-74
- every 2 years beginning at age 40 if increased risk factors - 10 years prior to the age the 1st degree relative was diagnosed
- clinical breast exam every 3 years in women age 20-39 years then annually after age 40
- breast self-exam monthly beginning at age 20 - immediately after menstruation on days 5-7 os the menstrual cycle
What is the tx of breast cancer?
- segmental mastectomy (lumpectomy) followed by breast irradiation in all patients and adjunctive chemotherapy in women with positive stage I and stage II with tumors less than 4 cm in diameter
- anti-estogren Tamoxifen is useful in tumors that are ER-positive - binds and blocks the estrogen receptor in the breast tissue
- aromatase inhibitors are useful in postmenopausal ER-positive patients with breast cancer - reduces the production of estrogen
- monoclonal AB treatment is useful in patients with HER2 positivity (human epidermal growth factor receptor)
What are the characteristics of a breast mass?
differenital includes: fibroadenoma, Paget disease, fibrocystic breast, breast abscess, malignant (invasive or noninvasive)
- the clinical presentation of a palpable breast mass is variable
- the characteristics of the mass to be evaluated include density (such as soft, hard, firm), skin changes, nipple areolar changes, and/or fixation to the chest wall
What is the first diagnostic test performed for a breast mass?
for all women with a suspicious breast mass, a mammogram is the first diagnostic test performed
-frequently, an ultrasound is also performed concurrently as a component of the evaluation
What are the characteristics of an ultrasonography for a breast mass?
for young women with a clinically benign mass, such as a fibroadenoma, and no family history of premenopausal breast cancer, an ultrasound is a useful initial diagnostic imaging study
What are the characteristics of a mammography for a breast mass?
a diagnostic mammogram is the first imaging study performed for a women with a new, palpable breast mass and should be performed even if a recent mammogram was negative
What are the characteristics of a MRI for a breast mass?
breast magnetic resonance imaging (MRI) is not indicated for the workup of an undiagnosed mass
-MRI is best reserved for diagnostic dilemmas and used with discretion, as there is a significant false positive rate, which dramatically increases the rate of benign biopsies
How is a definitive diagnosis of a breast mass?
by a breast biopsy, which includes a fine needle aspiration, core biopsy, or an open biopsy
What are the characteristics of Paget’s disease of the nipple?
1%
-chronic eczematous itchy, scaling rash on the nipples and areola
What are the characteristics of fibroadenoma?
a young women in her 20’s with a small, rubbery, firm, usually painless, well-circumscribed, completely round, and freely mobile breast mass
- the classic description with respect to consistency is “rubbery”, does not usually was and wane with menstruation
- no changes with the menstrual cycle
What is the tx of a fibroadenoma?
treatment of choice is a biopsy
What are fibrocystic changes?
multiple bilateral breast masses that increase in size and pain before menses
- bilateral breast involvement
- wax and wane with period
How is the dx of fibrocystic changes made?
diagnosis is by breast cyst aspiration supplemented by ultrasound and/or mammogram
- straw-colored fluid with no blood
- treat with NSAIDs, OCPs
What is a breast abscess?
a pocket of contained infection within the breast
- a progression from mastitis - symptoms are the same with addition of localized mass and systemic signs f infection
- staphylococcus aureus is the most common cause
What is the tx of a breast abscess?
I&D and anti-staph antibiotics
- regimen: nafcillin/ocacillin IV or cefazolin PLUS metronidazole
- alternative is vancomycin
- stop breast-feeding on the affected side - pump and dump
What is cervical cancer?
the third most common type of cancer, squamous-mot common (90%)
- patient is often asymptomatic or will often present with postcoital bleeding, friable, bleeding cereal lesion
- HPV is 99% the reason for cervical cancer, types that cause cancer 16, 18, 31, and 22, especially types 16, 18, associated with cigarette smoking
- transformation zone most commonly affected
What is the tx of cervical cancer?
resect and/or chemotherapy and radiation
- stage 1: conservative, simple, or radical hysterectomy
- stage 2 +: chemo +/- radiation
- 5-y survival - stage 1: 85-90% Stage 2: 65% Stage 3 29% Stage 4: 21%
What are the characteristics of barrier methods?
failure rates are as high as 40%, offer STI protection, safe for patients with contraindications to hormones
- male condoms: 20% failure rate, offers STI protection
- female condoms: 21% failure rate, offers STI protection
- diaphragm: 15% failure rate, must remain in place 6-24 hours after intercourse, requires pelvic exam and fitting
What are the characteristics of spermicides nontoxynol-9?
destroys sperm - often used with other forms of BCP such as condoms
- 27% failure rate
- slighting increased risk for HIV
What are the characteristics of OCP’s?
prevents ovulation by inhibiting mid-cycle LH surge, thickens cervical mucus, thins the endometrium
- 9% failure rate, 0.3% failure rate when used correctly
- improves dysmenorrhea and controls the menstrual cycle
- protects against ovarian cysts, ovarian and endometrial caner and improves acne
- there is no convincing evidence that OCP’s increase the risk of breast, cervical, or liver cancer, potential complications include thromboembolic events, hypertension, hepatic adenoma
- breakthrough bleeding, nausea, and breast tenderness usually resolve within the first three cycles
- combined estrogen and progesteron - not used in women > 35 years of age that are smokers, patients with a history of blood clots, breast cancer or migraines with aura
- 35 and younger who smoke OK
What are the characteristics a the transdermal patch?
this method is very effective, the contraceptive efficacy of the transdermal patch is comparable to that of combined OCP’s
- the failure rate is 0.3 percent with perfect use and 9% with typical use
- some evidence suggests that efficacy is slightly decreased in women who weigh more than 198 pounds; however, the patch is still a very effective method for these women
- the overall risk of VTE is all, approximately 100 cases per 100,00 per year
- for women 25 to 35 years old, the incidence is only 30 cases per 100,000 per year
What are the patient instructions for a transdermal patch?
- the patch should be applied to clean, dry skin on the abdomen, buttock, upper outer arm, or upper torso (excluding breasts)
- it should not be placed in areas that receive a lot of friction, such as under bra straps
- the patch must be changed weekly
- when the patch is removed, it should be folded closed to reduce the release of hormones and should be disposed of in the garbage
- to avoid the release of hormones into the soil and water supply, a used patch should not be flushed down the toilet
- non-hormonal back-up contraception is needed for the first 7 days if the patch is started any day other than day 1 of the mensural cycle
- if the patch falls off, a new patch should be applied immediately
- if the patch was off for more than 24 hours, 7 days of backup contraception is required
- this method does not protect against STIs