Oncology nursing is about protecting the client from the predictable dangers of treatment. Work through these 10 practice questions on chemo side effects (neutropenic fever, thrombocytopenia, mucositis, extravasation), radiation safety, and oncologic emergencies like SVC syndrome and tumor lysis, each with a full rationale.
Oncology Nursing: Chemo, Radiation Safety & Emergencies
Oncology nursing on the NCLEX centers on protecting the client from the predictable dangers of treatment. With chemotherapy, bone marrow suppression (myelosuppression) is the highest-stakes concern. Neutropenia lowers the absolute neutrophil count and severely impairs the body's ability to fight infection, so a fever in a neutropenic client is a medical emergency (neutropenic sepsis): obtain cultures and start broad-spectrum antibiotics fast. Neutropenic precautions include a private room, meticulous hand hygiene, avoiding crowds and sick contacts, no fresh flowers or standing water, and a low-microbial diet (no raw fruits or vegetables). Thrombocytopenia triggers bleeding precautions (soft toothbrush, electric razor, no IM injections, no aspirin/NSAIDs), and anemia causes fatigue that calls for energy conservation. Expect and pre-medicate nausea/vomiting; manage mucositis with a soft brush and saline or sodium bicarbonate rinses while avoiding alcohol-based mouthwash and hot, spicy, or acidic foods.
Radiation safety splits into two worlds. External beam clients are not radioactive: do not wash off the skin markings, use gentle skin care and avoid lotions, powders, or deodorant on the site unless approved by the radiation team, and protect the area from sun. Internal (sealed implant/brachytherapy) clients emit radiation, so apply time, distance, and shielding. Use a private room, a dosimeter badge, limited staff time, and exclude children and pregnant visitors and caregivers. Keep a lead container and long-handled forceps in the room; a dislodged implant is never touched with bare hands.
Finally, memorize the oncologic emergencies: superior vena cava syndrome (facial/neck/upper-body swelling, dyspnea, distended neck veins), spinal cord compression (new back pain with neuro deficits), hypercalcemia from bone metastasis, and tumor lysis syndrome (high potassium, phosphorus, and uric acid with low calcium). Vesicant extravasation is also urgent: stop the infusion immediately, leave the catheter in place, and follow the antidote protocol to prevent tissue necrosis.
Oncology & Cancer Care NCLEX Practice Questions
Question 1 · Chemotherapy — Neutropenia/Infection
A client receiving chemotherapy has an absolute neutrophil count of 480/mm3 and a temperature of 101.3 F (38.5 C). Which action should the nurse take first?
- A Administer acetaminophen and reassess the temperature in 1 hour
- B Encourage increased oral fluids and apply cool compresses
- C Obtain blood cultures and prepare broad-spectrum antibiotics
- D Document the finding and continue routine monitoring
Show answer & rationale
Correct answer: C
An absolute neutrophil count below 500/mm3 defines severe neutropenia, and a temperature at or above 100.4 F (38 C) in this setting is febrile neutropenia, a true medical emergency. The neutropenic client cannot mount a normal inflammatory response, so infection can progress to septic shock within hours. Obtaining cultures and starting broad-spectrum antibiotics quickly (the 'time is tissue' antibiotic principle) is the standard of care and is the priority. Giving acetaminophen and waiting an hour dangerously delays antibiotics and masks the fever, which is often the only sign of infection this client can produce. Pushing fluids and applying cool compresses treats comfort and the temperature but ignores the underlying infection that can kill; it is not the priority. Simply documenting and monitoring abandons the client to a rapidly progressive process. Clinical pearl: in oncology, 'fever + neutropenia = cultures and antibiotics now.' Draw blood cultures (peripheral and from any central line), then give the ordered antibiotic without waiting for results; every hour of delay increases mortality. Also remember the ANC formula: ANC = total WBC x (percent segs + percent bands) / 100. An ANC under 1,000 warrants precautions, and under 500 is high risk.
Question 2 · Chemotherapy — Neutropenic Precautions
A nurse is teaching a neutropenic client about protecting against infection at home. Which instructions should the nurse include? Select all that apply.
- A Share a bedroom with a family member to avoid feeling isolated
- B Perform meticulous hand hygiene throughout the day
- C Avoid crowds and people who have colds or infections
- D Avoid keeping fresh flowers and standing water in your living space
- E Take your temperature and report a fever promptly
- F Wash raw fruits and vegetables and eat them freely each day
Show answer & rationale
Correct answer: B, C, D, E
Neutropenic precautions aim to reduce exposure to microorganisms because the client cannot fight infection normally. Fresh flowers, potted plants, and standing water (vases, humidifiers, old cut-flower water) harbor gram-negative bacteria and fungi, so they are removed. Meticulous hand hygiene is the single most effective infection-prevention measure and belongs in the plan. Avoiding crowds and people with active infections limits exposure to respiratory and contact pathogens. Monitoring temperature and reporting fever promptly is essential because fever may be the only early sign of life-threatening infection in a client who cannot form pus or robust inflammation. Eating raw fruits and vegetables freely, even after washing, is incorrect: a neutropenic (low-microbial) diet avoids raw fruits and vegetables, undercooked meats, and unpasteurized products because these carry bacteria; the guidance to eat them 'freely' is unsafe. Sharing a bedroom is incorrect because the neutropenic client should have a private space and avoid close contacts who may transmit organisms. Clinical pearl: think 'clean hands, clean food, clean air, and know your temperature.' A temperature at or above 100.4 F (38 C) is reported immediately, and the client should avoid gardening, cleaning pet waste, and receiving live vaccines during the neutropenic period.
Question 3 · Chemotherapy — Thrombocytopenia
A client with chemotherapy-induced thrombocytopenia (platelet count 22,000/mm3) is being discharged. Which instruction should the nurse reinforce?
- A Use a soft-bristled toothbrush and an electric razor
- B Take aspirin as needed for headaches or aches
- C Floss vigorously twice daily to prevent gum disease
- D Request intramuscular injections instead of oral medications
Show answer & rationale
Correct answer: A
Thrombocytopenia (a platelet count well below the normal 150,000-400,000/mm3) markedly increases bleeding risk, so the client follows bleeding precautions. A soft-bristled toothbrush and an electric razor minimize trauma to gums and skin, preventing bleeding that is difficult to control, so this is correct. Aspirin is contraindicated because it irreversibly inhibits platelet aggregation and promotes bleeding; the same caution applies to NSAIDs like ibuprofen. Vigorous flossing traumatizes the gums and can cause prolonged oral bleeding; gentle oral care is preferred and vigorous flossing is avoided. Requesting intramuscular injections is exactly backward: IM and rectal routes are avoided in thrombocytopenia because puncture and mucosal trauma can cause hematomas and bleeding; the oral or IV route is safer. Clinical pearl: for bleeding precautions think 'soft, smooth, and no sticks' – soft toothbrush, electric razor, no IM/rectal, no aspirin/NSAIDs, avoid contact sports and blowing the nose forcefully, and apply pressure to any puncture site. Report bruising, petechiae, black or tarry stools, or bleeding gums. Platelet transfusion is typically considered for counts under 10,000/mm3 or with active bleeding.
Question 4 · Chemotherapy — Extravasation
While a vesicant chemotherapy agent is infusing through a peripheral IV, the client reports burning and the nurse notes swelling and no blood return at the site. Which action should the nurse take first?
- A Flush the line rapidly with normal saline to dilute the drug
- B Stop the infusion immediately while leaving the catheter in place
- C Remove the IV catheter and apply firm pressure to the site
- D Elevate the extremity and continue the infusion at a slower rate
Show answer & rationale
Correct answer: B
Burning, swelling, and loss of blood return signal extravasation of a vesicant, meaning the drug is leaking into surrounding tissue where it can cause severe damage and necrosis. The first action is to stop the infusion immediately to prevent further tissue exposure. The catheter is left in place initially so that residual drug can be aspirated and any antidote can be delivered through the same site per the extravasation protocol. Rapidly flushing with saline is wrong because it forces more vesicant into the tissue and worsens injury. Removing the catheter right away is incorrect because it eliminates access needed to aspirate the drug and administer the antidote; removal comes later per protocol. Continuing the infusion, even slowed and with elevation, is dangerous and directly harms the client. Clinical pearl: remember the extravasation sequence – Stop the infusion, don't pull the line, aspirate residual drug, then follow the drug-specific antidote and warm/cold compress orders (cold for most vesicants; warm for vinca alkaloids). Mark and photograph the area, notify the provider, and document. The best defense is prevention: verify a brisk blood return and monitor closely, and use a central line for known vesicants when possible.
Question 5 · Radiation — External Beam
A client is receiving external beam radiation therapy to the chest. Which self-care instruction is correct?
- A Apply a scented lotion to the treatment site to soothe the skin
- B Scrub the skin markings off after each daily session
- C Expose the treated area to direct sunlight to promote healing
- D Wash gently with lukewarm water and leave the markings intact
Show answer & rationale
Correct answer: D
External beam radiation targets a precisely mapped field, and the skin markings (tattoos or ink lines) guide accurate daily positioning, so they must be preserved. Washing gently with lukewarm water and mild technique while leaving the markings intact protects both the fragile skin and treatment accuracy, making this correct. Scented lotions, creams, powders, deodorants, and perfumes are avoided on the treatment field unless specifically approved, because they can contain metals or irritants that intensify the skin reaction; applying scented lotion is wrong. Scrubbing off the markings is incorrect because it erases the alignment guides and forces re-simulation, and the friction irritates already-sensitive skin. Sun exposure is harmful: irradiated skin burns easily and must be protected from direct sun, so exposing it to sunlight is wrong. Clinical pearl: for external beam think 'don't wash it off, don't rub it, don't perfume it, don't tan it.' Use gentle, lukewarm water, pat dry, wear loose soft cotton clothing, and avoid heat, cold packs, and shaving over the field. Reassure the client that external beam recipients are NOT radioactive and pose no danger to family, including children and pregnant contacts. Fatigue and localized skin changes are expected effects.
Question 6 · Radiation — Internal (Brachytherapy)
A nurse is caring for a client with a sealed cervical radiation implant (brachytherapy). Which nursing action is appropriate?
- A Allow the client's 6-year-old grandchild to visit briefly at the bedside
- B Assign a nurse who is pregnant to provide the client's direct care
- C Organize care to minimize the time spent close to the client
- D Place the client in a semiprivate room near the nurses' station
Show answer & rationale
Correct answer: C
A sealed internal implant makes the client a source of radiation, so care follows the three protection principles: time, distance, and shielding. Organizing care to minimize time near the client reduces the nurse's exposure while still meeting needs, so this is correct – cluster tasks, prepare supplies in advance, and work efficiently. Allowing a young child to visit is unsafe because children (and pregnant visitors) are excluded from the room due to radiation sensitivity. Assigning a pregnant nurse is contraindicated for the same reason; pregnant staff should not care for clients with active implants. A semiprivate room is wrong because the client requires a private room to protect other clients from exposure; proximity to the nurses' station does not address radiation safety and increases staff exposure. Clinical pearl: 'time, distance, shielding' governs everything with sealed sources. Wear a dosimeter film badge to track your exposure, stand at the foot of the bed and at a distance when possible, use a lead shield, and keep visits brief and no closer than the recommended distance (often about 6 feet) and time-limited. Always keep a lead-lined container and long-handled forceps in the room in case the implant dislodges – it is never handled with bare hands.
Question 7 · Radiation — Sealed Implant Safety
A nurse is setting up the room and plan of care for a client with a sealed radiation implant. Which interventions are appropriate? Select all that apply.
- A Place the client in a private room
- B Encourage the client to ambulate frequently in the hallway
- C Wear a dosimeter film badge each time entering the room
- D Keep a lead-lined container and long-handled forceps in the room
- E If the implant dislodges, pick it up with gloved hands and reinsert it
- F Restrict visits by children and pregnant women
Show answer & rationale
Correct answer: A, C, D, F
Sealed-implant safety is built on time, distance, and shielding. A lead-lined container with long-handled forceps must be in the room so a dislodged source can be retrieved without direct handling, so this is correct. Wearing a dosimeter film badge on every entry tracks cumulative occupational exposure and is a standard requirement. Restricting children and pregnant visitors is correct because both groups are highly radiosensitive and must be kept away from the source. A private room is required to prevent exposing other clients, so that is correct. Picking up a dislodged implant with gloved hands and reinserting it is dangerous and incorrect: a dislodged source is NEVER touched with hands (gloves do not shield radiation) – it is retrieved with long-handled forceps and placed in the lead container, then radiation safety is notified. Encouraging frequent hallway ambulation is incorrect and unsafe because the client is a mobile radiation source; the client remains on bed rest or in the private room to keep the source contained and protect others. Clinical pearl: with a sealed source, 'forceps and lead, not hands and hope.' Also keep bed linens and dressings in the room and survey them before disposal, since a dislodged seed could be hidden among them.
Question 8 · Oncologic Emergencies — SVC Syndrome
A client with advanced lung cancer develops swelling of the face and neck, distended neck veins, and shortness of breath. The nurse should recognize these findings as indicating which condition?
- A Superficial thrombophlebitis of the arm
- B Superior vena cava syndrome, an oncologic emergency
- C An allergic reaction to chemotherapy
- D Expected fluid retention from corticosteroid therapy
Show answer & rationale
Correct answer: B
Facial and neck swelling, distended neck veins, and dyspnea in a client with a thoracic (often lung) malignancy are classic signs of superior vena cava (SVC) syndrome, in which a tumor compresses or obstructs the SVC and blocks venous return from the head, neck, and upper body. This is an oncologic emergency because progressive obstruction can cause airway compromise and increased intracranial pressure, so it is the correct interpretation and requires prompt provider notification, elevation of the head of the bed, and urgent treatment (radiation, stenting, or chemotherapy). Superficial thrombophlebitis produces localized redness, warmth, and tenderness along a vein – not bilateral facial/neck swelling with distended neck veins and dyspnea – so it is wrong. An allergic reaction typically presents with urticaria, wheezing, hypotension, and generalized itching soon after drug exposure, not the specific upper-body venous congestion described, so it is incorrect. Corticosteroid fluid retention causes gradual, generalized edema and weight gain, not acute neck-vein distention with dyspnea, so calling it 'expected' is dangerous and wrong. Clinical pearl: think 'upper-body backup' – swelling above the heart plus distended neck veins in a chest-cancer client equals SVC syndrome until proven otherwise. Early signs include morning facial fullness and tight shirt collars.
Question 9 · Oncologic Emergencies — Tumor Lysis Syndrome
A client is being monitored for tumor lysis syndrome after starting chemotherapy for a bulky lymphoma. Which laboratory findings would the nurse expect? Select all that apply.
- A Decreased potassium level
- B Elevated uric acid level
- C Elevated calcium level
- D Elevated potassium level
- E Elevated phosphorus level
- F Decreased calcium level
Show answer & rationale
Correct answer: B, D, E, F
Tumor lysis syndrome (TLS) occurs when large numbers of cancer cells rupture and spill intracellular contents into the blood, most often after chemotherapy for bulky, rapidly dividing tumors. The classic pattern is elevated uric acid (from nucleic acid breakdown), elevated potassium (hyperkalemia from intracellular potassium release), and elevated phosphorus (hyperphosphatemia); the rising phosphorus binds calcium and drives calcium down, producing hypocalcemia. Therefore elevated uric acid, elevated potassium, elevated phosphorus, and decreased calcium are all correct. A decreased potassium level is wrong because TLS causes hyperkalemia, not hypokalemia, and hyperkalemia is the most immediately life-threatening feature due to cardiac arrhythmia risk. An elevated calcium level is wrong because the high phosphorus consumes calcium, so calcium falls rather than rises. Clinical pearl: TLS is 'high, high, high, low' – high potassium, high phosphorus, high uric acid, low calcium. Prevention and treatment center on aggressive IV hydration to protect the kidneys and flush out uric acid, plus allopurinol or rasburicase to lower uric acid. Watch the ECG for peaked T waves and monitor renal function closely, since acute kidney injury from uric acid and calcium-phosphate deposition is a major danger.
Question 10 · Chemotherapy — Mucositis/Stomatitis
A client receiving chemotherapy develops painful oral mucositis. Which instruction should the nurse provide for oral care?
- A Rinse with a commercial alcohol-based mouthwash several times daily
- B Eat hot, spicy foods to stimulate the appetite
- C Use a firm-bristled toothbrush to scrub away debris thoroughly
- D Rinse the mouth with normal saline or a sodium bicarbonate solution
Show answer & rationale
Correct answer: D
Chemotherapy damages the rapidly dividing cells of the oral mucosa, causing mucositis and stomatitis. Frequent bland rinses with normal saline or a sodium bicarbonate solution soothe the tissue, keep the mouth clean, and reduce microbial load without irritation, so this is the correct instruction. Alcohol-based commercial mouthwash is wrong because alcohol dries and burns the already-inflamed, ulcerated mucosa and worsens pain and breakdown; it is specifically avoided. Hot and spicy foods (and acidic or rough-textured foods) irritate the inflamed mucosa and increase pain, so they are avoided rather than encouraged; a bland, soft, cool diet is preferred. A firm-bristled toothbrush traumatizes fragile tissue and can cause bleeding, especially if the client is also thrombocytopenic; a soft-bristled brush or foam swab is used. Clinical pearl: for mucositis think 'soft brush and bland rinses, nothing that burns.' Encourage regular gentle oral care every few hours, keep the mouth moist, avoid alcohol and tobacco, and use prescribed anesthetic or coating rinses for pain. Assess the oral cavity daily, because mucositis is both a comfort issue and an entry point for infection in an immunocompromised client.
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Oncology & Cancer Care FAQ
What is a neutropenic fever and why is it an emergency?
A neutropenic fever is a temperature of 100.4 F (38 C) or higher in a client whose absolute neutrophil count is low from chemotherapy. Because the immune system cannot fight infection, it can progress to septic shock within hours. The standard response is to obtain blood cultures and start broad-spectrum antibiotics quickly, without waiting for results. On the NCLEX, fever plus neutropenia always means cultures and antibiotics now.
Are clients receiving radiation therapy radioactive?
It depends on the type. Clients getting external beam radiation are NOT radioactive and are safe around family, children, and pregnant contacts. Clients with an internal sealed implant (brachytherapy) ARE a radiation source while the implant is in place, so they need a private room, a dosimeter badge, time and distance precautions, and no visits from children or pregnant people. A lead container and long-handled forceps stay in the room for a dislodged implant.
What precautions matter most for thrombocytopenia?
Thrombocytopenia means a low platelet count and high bleeding risk, so the client follows bleeding precautions. Use a soft-bristled toothbrush and an electric razor, avoid intramuscular and rectal routes, and avoid aspirin and NSAIDs. Watch for bruising, petechiae, bleeding gums, and black or tarry stools. A memory aid is 'soft, smooth, and no sticks.' Platelet transfusion is typically considered for counts under 10,000/mm3 or with active bleeding.
What are the main oncologic emergencies to recognize?
Know four: superior vena cava syndrome (facial and neck swelling, distended neck veins, dyspnea), spinal cord compression (new or worsening back pain with neurologic deficits), hypercalcemia from bone metastasis (confusion, weakness), and tumor lysis syndrome (high potassium, phosphorus, and uric acid with low calcium). Vesicant extravasation is also urgent: stop the infusion immediately, leave the catheter in place, and follow the antidote protocol to prevent tissue necrosis.