What is the recommended treatment for chronic sinusitis without nasal polyps?

Treatment of Chronic Rhinosinusitis Without Nasal Polyps

For chronic rhinosinusitis without nasal polyps (CRSsNP), initiate treatment with daily high-volume saline irrigation combined with topical intranasal corticosteroids as first-line therapy. 1, 2, 3

Diagnostic Verification

Before initiating treatment, confirm the diagnosis meets established criteria: symptoms lasting ≥12 weeks including two or more of the following: nasal obstruction, purulent discharge (anterior/posterior), facial pain/pressure, and reduced sense of smell. 4, 5 Objective documentation of sinonasal inflammation must be confirmed through anterior rhinoscopy, nasal endoscopy, or CT imaging. 1, 2

First-Line Medical Therapy

Topical Intranasal Corticosteroids

• Prescribe intranasal corticosteroids (mometasone furoate, fluticasone propionate, or fluticasone furoate preferred) once daily for long-term maintenance therapy. 6, 2
• These agents improve symptom scores (standardized mean difference -0.46) and are the mainstay of treatment. 7
• Instruct patients to aim the spray toward the outer nasal wall (not the septum) while looking down to prevent epistaxis and optimize delivery. 2
• Continue therapy long-term if beneficial, as CRSsNP is a chronic condition requiring ongoing management. 6, 2

Saline Irrigation

• Recommend high-volume (≥240 mL per session) saline irrigation daily. 1, 3, 7
• Saline irrigation significantly improves symptom scores (standardized mean difference 1.42) compared to no treatment. 7
• This can be performed with isotonic or hypertonic saline solutions. 1

Second-Line Therapies

Antibiotics

• Only prescribe antibiotics when significant or persistent purulent nasal discharge is present on examination. 4, 5
• For infectious exacerbations with purulence, use amoxicillin-clavulanate or fluoroquinolones with enhanced Gram-positive activity for 10-14 days. 8, 9
• Do not prescribe antibiotics in the absence of purulent discharge, as the role of antibiotics in non-infectious CRSsNP is controversial. 8, 5
• Consider a 3-month course of macrolide antibiotics (e.g., azithromycin) for patients without polyps who fail initial therapy, as this may improve quality of life. 7

Oral Corticosteroids

• Consider a short course (10 days) of oral prednisolone at 0.5 mg/kg tapered over 10 days for patients with symptom duration <11 months who have failed topical therapy. 10
• This approach significantly improved SNOT-22 scores, endoscopy findings, and CT scores at 2 months, with 52.5% of patients avoiding surgery at 12 months. 10
• Patients with symptoms >11 months are less likely to benefit from oral steroids. 10
• Weigh benefits against risks including gastrointestinal symptoms, insomnia, hyperglycemia in diabetics, adrenal suppression, and bone loss. 2

Therapies to Avoid

Antifungal Therapy

• Do not prescribe topical or systemic antifungal therapy for CRSsNP due to lack of efficacy and potential adverse effects. 2, 3

Biologics

• Do not routinely prescribe biologics (dupilumab, mepolizumab, omalizumab) for CRSsNP, as randomized trials have excluded patients without polyps and benefits are uncertain. 3

Assessment for Modifying Conditions

Evaluate for conditions that modify management: 1, 2

• Asthma (present in many CRS patients; treating CRS benefits asthma control) 8, 11
• Allergic rhinitis (found in 26% of chronic sinusitis patients; treat with antihistamines if present) 8
• Gastroesophageal reflux disease (GERD; medical treatment may improve sinusitis symptoms) 8
• Immunodeficiency (consider quantitative immunoglobulins, functional antibody tests, HIV testing if recurrent infections) 8
• Aspirin sensitivity (consider aspirin desensitization in appropriate patients) 8

Surgical Considerations

Offer endoscopic sinus surgery when: 4, 5, 6

• Anticipated benefits exceed nonsurgical management alone
• Medical therapy has failed to provide adequate symptom relief
• Patient understands expectations for long-term postoperative medical management
• CT imaging with fine-cut protocol confirms disease extent 4, 5

Do not require a predefined duration or regimen of medical therapy as a prerequisite to surgery. 4, 5 The decision should be based on symptoms, disease characteristics, quality of life, and prior treatment response rather than arbitrary timeframes. 4, 5

Common Pitfalls

• Prescribing antibiotics without documented purulent discharge leads to unnecessary antibiotic exposure and resistance. 4, 5
• Failing to provide proper patient education on intranasal steroid technique results in suboptimal drug delivery and epistaxis. 2
• Discontinuing topical therapy prematurely—CRSsNP requires long-term maintenance treatment. 6, 2
• Using oral steroids in patients with symptom duration >11 months, who are unlikely to respond. 10