Febrile Neutropenia — SAQ

Stem

A candidate is asked to manage a classic presentation of Febrile Neutropenia in an exam setting. Use precise definitions, scores, doses, and decision thresholds.

Core knowledge (model answer backbone)

Febrile neutropenia is an oncologic emergency defined as a single oral temperature at least 38.3 degrees Celsius, or 38.0 degrees sustained for one hour, in a patient with an absolute neutrophil count under 0.5 x10^9/L (or under 1.0 with predicted decline). Empiric broad-spectrum antipseudomonal beta-lactam therapy must be given within 60 minutes of recognition, after urgent blood cultures, with MASCC risk stratification guiding oral step-down versus inpatient IV care.

Red flags

• id: 1
• id: 2
• id: 3
• id: 4

High-yield structure examiners expect

Cover: Overview & Definition, Classification, Epidemiology & Risk Factors, Pathophysiology, Clinical Presentation, Differential Diagnosis.

Key doses / thresholds (from topic teaching)

• piperacillin-tazobactam 4.5 g IV every 6 hours** — must be administer
• Ciprofloxacin 500 mg BD + co-amoxiclav 625 mg TDS", "Daily r
• Piperacillin-tazobactam 4.5 g IV q6h first-line", "Daily review; esca
• lactate over 2 mmol/L, mottled skin, oliguria, oxygen satur
• a value over 2 mmol/L is a sepsis red flag and predicts pro
• hree hours if hypotensive or lactate over 2 mmol/L

Questions

a) Define the condition and give the most important classification or severity framework used in exams. (3 marks)

• Clear one-line definition matching standard teaching.
• Named classification / stages / types with discriminating features.
• One sentence on why classification changes management.

b) Outline pathophysiology in a mechanism chain that explains the main clinical features. (3 marks)

• Initiating insult → intermediate pathway → end-organ effect.
• Link at least two symptoms/signs to mechanism.
• Mention one complication pathway (e.g. shock, perforation, herniation, arrhythmia).

c) List discriminating clinical features and bedside assessment. (3 marks)

• Classic presentation plus one atypical group (elderly, pregnancy, child, immunocompromised).
• Named signs/manoeuvres if relevant.
• What must never be missed on exam/bedside (pregnancy test, airway, glucose, etc.).

d) Investigations with thresholds and one named score if applicable. (3 marks)

• First-line tests and what positive findings mean.
• Gold-standard or definitive investigation when needed.
• Score components reproduced exactly if a named score is standard for this topic.

e) Immediate resuscitation and definitive management with doses where standard. (3 marks)

• ABC / time-critical steps first.
• First-line drug(s) with agent + dose + route (or procedure steps).
• Escalation triggers (theatre, ICU, thrombolysis window, antidote, etc.).
• Disposition and safety-netting.

Marking tips

Full marks require specificity (numbers, names, doses) not generic "give antibiotics/fluids." Regional practice (ICMR / NICE / AHA) may be cited as alternative where relevant.