🩻 TOACS FCPS Station · Chest X‑ray: Staphylococcal Pneumonia
📷 Chest X‑ray (PA view)
🔍 Key radiographic features:
- ✓ Multifocal opacities with patchy consolidations
- ✓ Pneumatoceles – thin-walled air-filled cystic spaces
- ✓
- ✓ Necrotizing pneumonia – cavities with irregular margins
- ✓ Rapid progression over 24-48 hours (characteristic of S. aureus)
📋 Clinical scenario (examiner prompt)
A 3‑year‑old previously healthy child presents with high fever (40°C), productive cough, and respiratory distress of 3 days' duration. He appears toxic and has decreased breath sounds on the right side with dullness. The chest X‑ray (PA view) shows multifocal consolidations, pneumatoceles, and a right pleural effusion.
🧑⚕️ Examiner tasks · TOACS
1. Identify the diagnosis from the X‑ray and clinical context.
2. Describe the X‑ray findings (pneumatoceles, empyema, necrotizing pattern).
3. Discuss the most likely organism and its key virulence factors.
4. Outline management (antibiotics, drainage, toxin suppression).
🎯 Expected answers (for examiners)
- • Diagnosis: Staphylococcal pneumonia (likely CA-MRSA with PVL)
- • X‑ray: Pneumatoceles (thin-walled cysts), empyema, multifocal consolidations, rapid progression
- • Organism: S. aureus – PVL causes necrotizing pneumonia; MRSA common
- • Management: IV vancomycin + clindamycin (toxin suppression), chest tube for empyema, consider surgical drainage
⚡ Quick FCPS‑style MCQ
A child with staphylococcal pneumonia, pneumatoceles, and empyema. In addition to vancomycin, which antibiotic should be added for toxin suppression?
A. Clindamycin B. Gentamicin C. Metronidazole D. Ciprofloxacin📌 Topic summary ·
Staphylococcus aureus (MSSA/MRSA)
PVL (Panton-Valentine leukocidin) → necrotizing pneumonia
Pneumatoceles, empyema, rapid progression
Vancomycin (MRSA) + clindamycin (toxin suppression)
Chest tube for empyema; VATS if needed
Bronchopleural fistula, pneumothorax, sepsis
| Feature | Staphylococcal Pneumonia |
|---|---|
| Typical presentation | Toxic, high fever, rapid progression |
| Imaging | Pneumatoceles, empyema, necrotizing cavities |
| MRSA coverage | Vancomycin, linezolid, daptomycin (not for pneumonia) |
| Toxin suppression | Clindamycin (suppresses PVL and TSST-1) |
| Drainage | Empyema requires chest tube ± VATS |