2026 International Guidelines for ENT Conditions
Acute Bacterial Rhinosinusitis (ABRS)
Watchful waiting without antibiotics is now the recommended initial strategy for ALL patients with uncomplicated ABRS, regardless of severity 1.
Diagnostic Criteria
- Purulent nasal drainage (anterior or posterior) persisting ≥10 days beyond onset of upper respiratory symptoms, OR
- Worsening symptoms within 10 days after initial improvement 1
Management Algorithm
Initial approach (all severity levels):
- Watchful waiting without antibiotics for uncomplicated cases
- Patient education and counseling emphasized 1
When antibiotics are indicated:
- First-line: Amoxicillin with or without clavulanate (changed from amoxicillin alone in prior guidelines) 1
- Reserve antibiotics for patients who fail watchful waiting or have complications
Key Updates from 2025
The 2025 AAO-HNS guideline represents a major shift by extending watchful waiting to all ABRS patients, not just those with "mild" illness. This change is based on new evidence from 14 guidelines, 194 systematic reviews, and 133 RCTs 1.
Chronic Rhinosinusitis (CRS)
Pre-Surgical Medical Management
Do NOT prescribe antibiotics for CRS unless significant purulent nasal discharge is present on examination 2.
This is a strong recommendation because CRS is primarily an inflammatory condition, not an infectious one. The inflammation is mediated by immunopathologic pathways and is not necessarily associated with microbial infections 2.
Antibiotic Use in CRS
Non-macrolide antibiotics: Not recommended based on available evidence 2
Macrolide antibiotics (long-term ≥3 weeks):
- May be considered for their anti-inflammatory and immunomodulatory properties
- Evidence shows mixed results from placebo-controlled RCTs 2
Biologics for CRS
New 2025 recommendations:
- Recommend AGAINST biologics when patients do NOT have nasal polyps 1
- Educate patients about biologics when polyps ARE present 1
- Biologic therapies targeting type-2 inflammation have reduced exacerbation rates and decreased need for antibiotics and systemic corticosteroids 3
Third-Party Requirements
Do NOT prescribe empiric antibiotics for CRS solely to satisfy third-party requirements for surgery or imaging 1. This represents a new key action statement addressing inappropriate antibiotic stewardship.
Modified Management for Chronic Conditions
The following conditions require modified CRS management 1:
- Asthma
- Cystic fibrosis
- Immunocompromised state
- Ciliary dyskinesia
- Aspirin-exacerbated respiratory disease (AERD) - newly added in 2025
Acute Exacerbations of CRS (AECRS)
Cost-Effectiveness Approach
Observation is the most efficient initial strategy unless the probability of bacterial etiology exceeds approximately 49% 3.
Culture-Directed Antibiotics
- May improve longer-term endoscopic outcomes
- Short-term symptom and quality-of-life benefits remain unclear 3
Genetic and Microbiome Considerations
- CDHR3 gene variants identified as risk factors for AECRS
- Patients with AECRS more likely to harbor rare microbial taxa
- Most strains isolated during exacerbations form biofilms 3
Acute Otitis Media (AOM)
No specific 2026 guidelines were provided in the evidence for AOM management.
Otitis Externa
Prevention (Primary Focus)
Three key preventive interventions 4:
- Avoid injury to the ear canal
- Keep the ear canal dry
- Timely cerumen management
Management Components
- Patient education and counseling
- Comprehensive diagnostic assessment
- Pharmaceutical interventions
- Ear cleaning 4
Guideline Quality
The 2026 systematic review identified 4 high-quality clinical practice guidelines (from US, Colombia, and Russia) that met AGREE II assessment criteria 4.
Sudden Sensorineural Hearing Loss (SSNHL)
No specific 2026 guidelines were provided in the evidence for SSNHL management.
Head and Neck Cancer
No specific 2026 guidelines were provided in the evidence for head and neck cancer management.
Critical Complications Requiring Emergency Recognition
Red Flags for Complicated Sinusitis/Otitis 5
Watch for progression to:
- Acute mastoiditis
- Labyrinthitis
- Facial nerve palsy
- Orbital complications
- Frontal bone osteomyelitis
- Intracranial abscess
- Meningitis
- Cerebral venous sinus thrombosis
Early recognition and prompt interdisciplinary management are crucial to prevent irreversible sequelae including hearing loss, visual impairment, and permanent neurological deficits 5.
Imaging Considerations
Imaging should be used judiciously to confirm diagnosis and guide management, including radiography, nasal endoscopy, CT, and testing for allergy and immune function 1. The role of imaging must be differentiated from routine diagnostic workup versus evaluation for complications 6.