Pediatric Sinusitis

On this page

Pediatric Sinusitis - Little Noses, Big Woes

  • Inflammation of paranasal sinuses in children < 15 yrs.
  • Unique Aspects:
    • Ethmoid & maxillary sinuses present at birth; sphenoid by 5 yrs, frontal by 7-8 yrs.
    • Immature immune system.
    • Shorter, wider Eustachian tubes (↑risk of AOM co-occurrence).
  • Pathogens: Viral (most common); S. pneumoniae, H. influenzae, M. catarrhalis (bacterial).
  • Predisposing Factors: URI, allergic rhinitis, adenoid hypertrophy, GORD, ciliary dyskinesia, immunodeficiency, daycare.

    ⭐ Recurrent acute rhinosinusitis (RARS) is defined as ≥ 4 episodes/year with symptom resolution between episodes. Pediatric paranasal sinus development timeline

Pediatric Sinusitis - Symptom Spotting & Timelines

  • Key Persistent Symptoms (>10 days without improvement):
    • Nasal discharge (any quality)
    • Cough (daytime and/or nighttime)
  • Severe Onset Symptoms (Bacterial Indication):
    • Fever ≥39°C (concurrent)
    • Purulent nasal discharge
    • For ≥3 consecutive days
  • Other Common Signs:
    • Younger children: Irritability, poor feeding.
    • Older children: Facial pain/pressure, headache, halitosis.
  • Temporal Classification:
    • Acute Rhinosinusitis (ARS): Symptoms <4 weeks, full resolution.
    • Subacute Rhinosinusitis: 4-12 weeks, full resolution.
    • Chronic Rhinosinusitis (CRS): Symptoms ≥12 weeks, no full resolution.
    • Recurrent Acute Rhinosinusitis (RARS): ≥4 episodes/year, with interim resolution.

⭐ Viral URI is the most common predisposing factor for acute bacterial sinusitis in children.

Pediatric Sinusitis - Diagnostic Clues Unveiled

  • Primarily clinical diagnosis based on specific criteria:
    • Persistent illness: Nasal discharge (any type) AND/OR daytime cough for >10 days without improvement.
    • Severe onset: Concurrent fever ≥39°C AND purulent nasal discharge for at least 3-4 consecutive days.
    • Worsening course ("double sickening"): New onset fever, headache, or ↑ nasal discharge after initial improvement.
  • Imaging (CT scan preferred over X-ray):
    • Indicated for suspected orbital or intracranial complications.
    • Evaluation of chronic or recurrent sinusitis unresponsive to medical therapy.
    • Pre-operative planning for functional endoscopic sinus surgery (FESS).
  • Nasal endoscopy: Useful to visualize purulent discharge from middle meatus, polyps, or anatomical obstruction.

⭐ CT scan is the gold standard imaging modality for assessing complicated or chronic pediatric sinusitis and prior to surgical intervention. Coronal CT scan of pediatric sinusitis

Pediatric Sinusitis - Treatment Blueprints

  • Acute Bacterial Rhinosinusitis (ABRS):
    • First-line: Amoxicillin or Amoxicillin-clavulanate (90 mg/kg/day amoxicillin component). Duration: 10-14 days.
    • Severe/No response (48-72h): High-dose Amox-Clav, IV Cephalosporins (e.g., Ceftriaxone).
  • Adjunctive Therapy:
    • Nasal saline irrigation.
    • Intranasal corticosteroids (especially if allergic component).
    • Analgesics/antipyretics.
  • Chronic Rhinosinusitis (CRS) / Recurrent ARS:
    • Medical: Prolonged antibiotics (3-6 weeks), nasal steroids, saline irrigation.
    • Surgical:
      • Adenoidectomy (first-line for children <6 years or with significant adenoid hypertrophy).
      • Functional Endoscopic Sinus Surgery (FESS) for failed medical/adenoidectomy or older children.

⭐ Adenoidectomy is often the first-line surgical treatment for chronic rhinosinusitis in children <6 years, especially with adenoid hypertrophy, before considering FESS.

Pediatric Sinusitis - Complication Watchlist

Chandler Classification of Orbital Complications

  • Orbital (Chandler Classification):
    • Group I: Preseptal cellulitis (Inflammatory edema)
    • Group II: Orbital cellulitis
    • Group III: Subperiosteal abscess
    • Group IV: Orbital abscess
    • Group V: Cavernous sinus thrombosis
  • Intracranial:
    • Meningitis
    • Epidural abscess
    • Subdural empyema
    • Brain abscess
    • Dural sinus thrombosis
  • Bony: Osteomyelitis (Pott's puffy tumor - frontal sinus)

⭐ Preseptal cellulitis is the most common orbital complication of acute sinusitis in children. Urgent ophthalmology & ENT consult if suspected orbital/intracranial spread.

High‑Yield Points - ⚡ Biggest Takeaways

  • Viral URIs are the primary trigger for acute bacterial sinusitis in children.
  • Maxillary and ethmoid sinuses are most commonly involved due to their early development.
  • Diagnosis: Persistent symptoms >10 days, severe onset, or biphasic (worsening) illness.
  • Key pathogens: Streptococcus pneumoniae, non-typable Haemophilus influenzae, Moraxella catarrhalis.
  • First-line antibiotic: Amoxicillin or Amoxicillin-clavulanate.
  • Orbital complications like cellulitis or abscess are the most serious.
  • Chronic pediatric sinusitis is defined by symptoms lasting >12 weeks.

Practice Questions: Pediatric Sinusitis

Test your understanding with these related questions

A 6-year-old boy presents with fever and chills, cough, rapid breathing, difficulty breathing, and chest pain. A culture from a respiratory sample shows Gram-positive bacteria. What is the most likely organism causing this infection?

1 of 5

Flashcards: Pediatric Sinusitis

1/10

If a child presents with unilateral, foul-smelling nasal discharge, _____ must be excluded

TAP TO REVEAL ANSWER

If a child presents with unilateral, foul-smelling nasal discharge, _____ must be excluded

foreign body

browseSpaceflip

Enjoying this lesson?

Get full access to all lessons, practice questions, and more.

Start Your Free Trial