Breast Cancer- Level 2
Breast Cancer
Objectives
- By the end of the lecture, students will be able to:
- State the risk factors of breast cancer.
- Describe the various diagnostic methods and treatments for breast cancer.
- Explain the physical and emotional aspects of nursing care for a patient undergoing breast cancer surgery.
Risk Factors
- Female
- Age > 55
- Use of hormone therapy post-menopause
- Family history
- BRCA gene mutations
- Personal history of cancer (colon, endometrial, ovarian)
- Obesity
- Hormonal factors:
- Early menarche (< 12 years)
- Late menopause (> 55 years)
- No pregnancies
- First child after age 30
- No breastfeeding
- Long-term heavy smoking
- Alcohol intake (> 1 drink/day)
BRCA Gene Mutations
- BReast CAncer gene 1 and 2
- Everyone has BRCA genes.
- In normal cells, BRCA1 and BRCA2 help suppress tumors by preventing uncontrolled cell growth.
- Inheritance of BRCA1 and BRCA2 gene mutations has been linked to a greatly increased risk for breast, ovarian, and uterine cancers.
Ductal Carcinoma
- Breast cancer usually starts in milk ducts.
- It can then either:
- Remain in-situ – stay within the duct
- Become invasive – break through the walls of the ducts and metastasize
- 80\% of breast cancer is invasive ductal
Where Breast Cancer Occurs
- Most often occurs in the upper, outer quadrant of the breast
- Location of most of the glandular tissue
Diagnostics: Breast Self-Examination
- One of the best ways for a person to become self-aware of how their breasts normally look and feel, and to detect when something changes.
- NOT a reliable way to screen for breast cancer
Benign vs. Malignant Breast Mass
| Benign | Malignant |
|---|---|
| Round and well-defined | Irregular shape, poorly delineated |
| Freely movable | Nonmobile (usually attached to chest wall) |
| Tenderness or pain with palpation | Nontender |
Diagnostics
- Mammography: Start at age 45
- Ultrasound
- MRI
- Biopsy
- Fine needle vs. excisional
- Sentinel vs. axillary
- DNA testing for BRCA1 and BRCA2
Diagnostics: Sentinel Lymph Node Biopsy (SLNB)
- Helps identify the lymph node(s) that drain first from the tumor site - sentinel lymph node(s) (SLNs)
- Radioisotope and/or blue dye is injected into the affected breast and will travel the same route as the cancer.
- If the radioisotope or dye is found in any SLNs, they are biopsied (about 1-4 of them) and sent for pathologic analysis.
- If SNLs are negative – no further action needed
- If SNLs are positive (or cannot be identified) – may have a complete axillary lymph node dissection (ALND) where 12-20 lymph nodes are typically removed.
- SLNB is less invasive and has a lower mortality rate than ALND.
Breast Cancer Staging
- Breast cancer is staged to determine treatment.
- TNM System for Staging Breast Cancer
- Staging determined by: TNM (Tumor size, Nodal involvement, Metastasis)
- T (Tumor size)
- T-1: 0-2 centimeters
- T-2: 2-5 centimeters
- T-3: >5 centimeters
- T-4: Tumor has broken through skin or attached to chest wall
- N (Lymph Node Status)
- N-0: Surgeon can't feel any nodes
- N-1: Surgeon can feel swollen nodes
- N-2: Nodes feel swollen and lumpy
- N-3: Swollen nodes located near collarbone
- M (Metastasis)
- M-0: Tested nodes are cancer-free
- M-1: Tested nodes show cancer cells or micrometastasis
Treatment
- Surgery
- Radiation
- Chemotherapy
- Hormonal therapy
Surgery
- Lumpectomy – with radiation therapy
- Mastectomy – with or without reconstruction
- Simple (total) mastectomy – removal of all breast tissue with SLNB
- Modified radical mastectomy – removal of all breast tissue with ALND; pectoralis muscle is spared
Lymphedema
- Definition: Swelling of extremity due to damaged lymph nodes
- Complications:
- Pain
- Impaired motor function
- Numbness
- Paresthesia of fingers
- Slow wound healing
- Cellulitis
Lymphedema: Nursing Care
- Positioning:
- Elevate affected arm on a pillow when lying down
- Exercise:
- Flexing and extending fingers begins in PACU with progressive increase in activity at surgeon’s direction
- Don’t put stress on incision or involve shoulder until directed by HCP.
- Massage:
- Decongestive therapy with lymphedema therapist
- Compression:
- Use intermittent pneumatic compression sleeve or a fitted, elastic pressure sleeve during waking hours
- No blood pressure readings, venipunctures, or injections on affected arm.
- Avoid burns. Use cooking mitt.
- Avoid cuts.
- Avoid cutting cuticles. Push back cuticle.
- Use electric razor for shaving axilla.
External Radiation
- Used after surgery to:
- Prevent local breast cancer recurrence
- Prevent lymph node recurrence
- Relieve pain caused by spread of cancer
- Primary lesions are radiated over several weeks.
Internal Radiation (Brachytherapy)
- Alternative to external radiation for early-stage breast cancer
- Delivered directly into cavity left after lumpectomy
- Treatment only takes 5 days
- Concentrated and focused
Radiation: Side Effects
- Fatigue
- Skin changes
- Breast edema
Chemotherapy
- Definition: Use of cytotoxic drugs to destroy cancer cells
- Can be used pre-op (neoadjuvant) or post-op (adjuvant)
- Pre-op: Shrinks the size of the tumor, making surgery more likely to succeed and allowing for more breast conservation
- Post-op: Decreases the rate of recurrence and increases the length of survival
- Combinations of drugs are more effective than the use of a single drug
Chemotherapy: Side Effects
- Nausea/Vomiting
- Anorexia
- Hair loss
- Anemia
- Difficulty concentrating/focusing
- Neutropenia
- Thrombocytopenia
Hormonal Therapy
- Estrogen receptor blocker
- Blocks estrogen, so less estrogen available for tumor; tumor regression occurs
- Tamoxifen (Nolvadex)
- Drug of choice for estrogen-receptor positive patients
- Side effects:
- Hot flashes, mood swings, vaginal discharge/dryness, decreased visual acuity, blood clots
Nursing Management: Psychological
- Loss of part (or all) of breast can affect a patient’s:
- Sexual identity
- Body image
- Relationships
- Provide a safe environment for expression of feeling.
- Help identify sources of support and strength.
Breast Reconstruction / Mammoplasty
- Breast reconstruction can be done with implant(s) or the patient’s own tissue.
- Musculocutaneous flap, most often taken from abdomen or back, is used in reconstruction.
- As part of the final stage of reconstruction, the nipple and areola are reconstructed.