❓Practice MCQs — Breast Cancer Nursing
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1. A 45-year-old woman undergoes modified radical mastectomy. On Day 2 post-op, her drain output is 280 mL in 24 hours. What is the most appropriate nursing action?
- Remove the drain immediately
- Clamp the drain for 4 hours
- Continue monitoring and record output accurately
- Aspirate the drain site with a syringe
Drain removal criterion is <30 mL per 24 hours. 280 mL on Day 2 is normal post-operatively as the body reabsorbs surgical fluids. Continue accurate monitoring and recording. Drains are typically removed when output is consistently <30 mL/24h for two consecutive days.
2. A patient with HER2+ breast cancer is prescribed trastuzumab (Herceptin). Which investigation is essential to perform before each cycle and every 3 months?
- CT scan chest/abdomen
- Echocardiogram (ECHO) / LVEF assessment
- Bone density (DEXA) scan
- Renal function (eGFR)
Trastuzumab causes cardiotoxicity (left ventricular dysfunction). ECHO/LVEF must be assessed at baseline and every 3 months during treatment. If LVEF drops >10% from baseline or falls below 50%, trastuzumab should be withheld and cardiology review sought.
3. Which breast cancer molecular subtype has the poorest prognosis and is disproportionately more prevalent in Arab and African women in the GCC?
- Luminal A (ER+/PR+/HER2-/Ki67 low)
- Luminal B (ER+/HER2+)
- HER2-enriched (HER2+, ER-, PR-)
- Triple Negative (ER-, PR-, HER2-)
Triple Negative Breast Cancer (TNBC) is the most aggressive subtype with the poorest prognosis. It lacks all three receptors (ER, PR, HER2), making hormone therapy and anti-HER2 therapy ineffective. It has a higher prevalence in Arab, African, and BRCA1-mutation carriers — all relevant to GCC nursing practice.
4. A post-mastectomy patient asks why she should avoid blood pressure measurement and venepuncture in her left arm (where axillary clearance was performed). What is the primary reason?
- To reduce the risk of lymphoedema development in the affected arm
- To prevent wound dehiscence of the mastectomy scar
- To avoid dislodging the surgical drain
- To prevent cardiac arrhythmias from venous stimulation
Following axillary lymph node clearance, the lymphatic drainage of the arm is compromised. Any trauma (venepuncture, BP cuff compression) can precipitate or worsen lymphoedema. This is a lifelong precaution to protect the affected arm from injury, infection and constriction that might overload the damaged lymphatic system.
5. A patient on tamoxifen reports irregular vaginal bleeding. What is the most important nursing action?
- Reassure her that this is a common side effect requiring no action
- Advise her to stop tamoxifen and restart after menstruation
- Refer urgently to gynaecology for investigation of possible endometrial pathology
- Recommend she switches to an aromatase inhibitor
Tamoxifen acts as an oestrogen agonist in the uterus, increasing the risk of endometrial hyperplasia and endometrial cancer. Any abnormal or irregular vaginal bleeding in a patient on tamoxifen must be investigated urgently by gynaecology with transvaginal ultrasound and endometrial biopsy as indicated. Never dismiss this symptom.
6. A woman receiving chemotherapy develops a temperature of 38.4°C. Her neutrophil count is 0.3 × 10⁹/L. What is the priority nursing intervention?
- Give paracetamol and review in 4 hours
- Take blood cultures x2 and administer broad-spectrum IV antibiotics within 1 hour
- Start oral antibiotics and increase fluid intake
- Apply cooling measures and contact oncology outpatient clinic in the morning
This is neutropenic fever — a medical emergency. Temp ≥38°C + neutrophils <0.5 × 10⁹/L = neutropenic sepsis. Blood cultures x2 (peripheral + central if port), IV broad-spectrum antibiotics (e.g., piperacillin-tazobactam/Tazocin, or meropenem) must be given within 1 hour per NICE CG151 guidelines. Delay in antibiotics increases mortality significantly.
7. The BI-RADS score of 4 on a mammography report indicates which of the following?
- Normal findings; routine annual screening recommended
- Probably benign; 6-month follow-up mammogram required
- Suspicious finding; tissue biopsy is recommended
- Known malignancy; treatment planning to begin
BI-RADS 4 indicates a suspicious finding with malignancy risk of 2–95%. It is sub-classified as 4A (low suspicion), 4B (moderate) and 4C (high). In all cases, tissue biopsy (core needle biopsy preferred) is recommended. BI-RADS 5 is highly suspicious (>95%), BI-RADS 6 is biopsy-proven malignancy.
8. When should a permanent breast prosthesis be fitted following mastectomy?
- Immediately on return from theatre
- At 2 weeks once sutures are removed
- At 1 month after discharge from surgical follow-up
- At 6–8 weeks post-operatively, after scar maturation
A temporary lightweight prosthesis (Cumfie/Softie) is provided immediately post-operatively. The permanent silicone prosthesis is fitted by a specialist breast care nurse at 6–8 weeks when the scar has matured, swelling has settled, and the chest wall has stabilised. Fitting too early risks discomfort and poor fit.
9. Which of the following is the MOST common histological type of breast cancer?
- Invasive ductal carcinoma (NST — No Special Type)
- Invasive lobular carcinoma
- Ductal carcinoma in situ (DCIS)
- Inflammatory breast cancer
Invasive ductal carcinoma (IDC/NST) accounts for approximately 80% of all invasive breast cancers. It arises from the ductal epithelium and typically presents as an irregular, firm, stellate mass. Invasive lobular carcinoma is the second most common type (~10%). DCIS is non-invasive (pre-invasive).
10. A 38-year-old GCC woman presents with triple negative breast cancer. According to BRCA testing guidelines, which factor MOST strongly warrants genetic counselling referral in her case?
- She is currently pregnant
- She has a history of fibrocystic breast disease
- She has TNBC diagnosed at age 38 (under 60 years)
- She received HRT for 2 years in her 30s
TNBC diagnosed at age ≤60 years is a strong indication for BRCA genetic testing referral, particularly BRCA1 mutations which are frequently associated with TNBC. Other indications include breast cancer ≤40, bilateral breast cancer, male breast cancer, ovarian cancer, and family history. In GCC populations, BRCA founder mutations in Arab groups further support testing this patient.