Oncologic Emergencies Nursing
On this page
Direct answer
Oncologic emergencies are the metabolic and structural catastrophes of cancer and its treatment that nurses on oncology wards detect first: febrile neutropenia, where a single temperature of 38.3°C or a sustained 38°C with an absolute neutrophil count below 500 demands antibiotics within the hour; tumour lysis syndrome with its signature chemistry of high potassium, high phosphate, high uric acid and low calcium; spinal cord compression announcing itself with new back pain; superior vena cava syndrome from lung cancer; and symptomatic hypercalcaemia. Each has a time-critical nursing pathway, and delay — waiting for a full report, waiting for the morning round — is the specific enemy.
What you must remember
- Febrile neutropenia: one temperature of 38.3°C or 38°C sustained over an hour with ANC below 500 (or expected to fall below) is a medical emergency; cultures peripherally and from every lumen, then empiric broad-spectrum antipseudomonal antibiotics within one hour — do not wait for counts or culture results.
- Tumour lysis syndrome: rapid lysis of bulky, treatment-sensitive tumours (Burkitt lymphoma, high-count leukaemias) releases potassium, phosphate, uric acid and the resultant hypocalcaemia; prevent with vigorous hydration and allopurinol, treat hyperuricaemia with rasburicase when risk is high, and monitor electrolytes, renal function and the ECG for peaked T waves.
- Hypercalcaemia of malignancy: confusion, constipation, polyuria, polydipsia and dehydration with a short QT; treat with saline rehydration then bisphosphonates.
- Superior vena cava syndrome: usually lung cancer or lymphoma compressing the SVC — facial and arm oedema, dyspnoea, distended neck and chest veins, head fullness that worsens lying or bending; sit the patient upright, and urgent stenting or oncological therapy follows.
- Metastatic spinal cord compression: new or worsening back pain, worse at night, preceding weakness, sensory level and late bladder-bowel changes; start dexamethasone per protocol, urgent whole-spine MRI, log-roll and preserve skin integrity, because motor outcome depends on speed.
- Chemotherapy extravasation: vesicants cause tissue necrosis — anthracyclines are treated with cold application, vinca alkaloids with warm application, with antidotes and plastic surgery referral; the prevention is meticulous vein choice and continuous infusion monitoring.
- Anthracycline cardiomyopathy is dose-cumulative (doxorubicin around 450 to 550 mg per square metre lifetime); bleomycin threatens lungs, and cyclophosphamide and ifosfamide cause haemorrhagic cystitis prevented by mesna and hydration.
- During fever workup in neutropenia, avoid rectal examinations, suppositories and invasive procedures that seed infection into compromised mucosa.
One night shift, three emergencies
At 21:00, a leukaemia patient on day 9 of induction spikes 38.5°C. The nurse's actions run as a drill: blood cultures from each lumen and a peripheral set drawn immediately, vitals and sepsis screen documented, and the first dose of piperacillin-tazobactam hanging within the hour — the resident is reminded, because early antibiotics are the whole point of the protocol. At 23:00, the Burkitt lymphoma patient starting chemotherapy develops palpitations; the potassium is 6.1, uric acid high, phosphate high, calcium low — the classic tetrad of tumour lysis, so hydration is forced, the ECG shows peaked T waves, calcium is given only if symptomatic per orders, and rasburicase is readied while urine output is charted hourly. At 01:00, a prostate cancer patient on the ward reports three days of thoracic back pain, now with new leg heaviness. This is presumed cord compression until excluded: dexamethasone is administered per standing protocol, the spine is immobilised with log-rolling, and urgent MRI is arranged, because the window for preserving ambulation closes within hours. One shift, three protocols, one principle: the nurse's recognition starts the clock.
Where students slip
The antibiotic-delay option — "await the neutrophil count before treating" — is the planted wrong answer in nearly every febrile neutropenia item. The tumour lysis chemistry is recalled with calcium high instead of low; the hypocalcaemia is secondary to phosphate binding and is the discriminator examiners quote. Cord compression items are answered with laxatives for the constipation or analgesics alone, missing that new back pain in a cancer patient is compression until imaging says otherwise. Extravasation answers swap hot for cold — anthracycline cold, vinca warm — and the sitting-upright instruction is forgotten in SVC stems.
Frequently asked questions
How is febrile neutropenia defined and what follows?
A single temperature of 38.3°C or 38°C sustained over an hour with ANC below 500; cultures are drawn immediately and empiric broad-spectrum antibiotics start within one hour.
What electrolyte pattern marks tumour lysis syndrome?
Hyperkalaemia, hyperphosphataemia, hyperuricaemia and secondary hypocalcaemia, risking arrhythmia and acute kidney injury, prevented by hydration and allopurinol.
What is the earliest symptom of spinal cord compression?
New or progressive back pain, typically worse at night and before any weakness — treated as an emergency with corticosteroids and urgent MRI.
How is chemotherapy extravasation managed?
Stop the infusion, aspirate residual drug, apply cold for anthracyclines and warm for vinca alkaloids, use the specific antidote, elevate the limb and document for plastic surgical review.
Which chemotherapy drug is limited by cumulative cardiac toxicity?
Doxorubicin and other anthracyclines, with lifetime cumulative caps in the region of 450 to 550 mg per square metre and periodic cardiac function testing.