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

BenignMalignant
Round and well-definedIrregular shape, poorly delineated
Freely movableNonmobile (usually attached to chest wall)
Tenderness or pain with palpationNontender

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.