Idiopathic Subglottic Stenosis: Improving Diagnosis and Awareness

Area of Science:

• Otolaryngology
• Pulmonology

Background:

• Idiopathic subglottic stenosis (iSGS) is a rare airway condition with an unknown cause.
• Delayed diagnosis is common due to its rarity, leading to prolonged patient suffering and progressive dyspnea.
• Increased awareness and prompt consideration in specific patient groups can improve diagnostic timelines.

Purpose of the Study:

• To retrospectively analyze patient characteristics and diagnostic factors for idiopathic subglottic stenosis.
• To identify key clinical features that may aid in earlier and more accurate diagnosis.
• To contribute to literature for raising awareness of iSGS.

Main Methods:

• Retrospective review of 10 adult patients diagnosed with iSGS at an otolaryngology clinic.
• Analysis of patient demographics, prior diagnoses, time to diagnosis, symptoms, and treatment outcomes.
• Evaluation included physical examination, stroboscopy, and pulmonary function testing (flow volume loops).

Main Results:

• All 10 patients were Caucasian females, mean age 46.7 years.
• 90% had prior asthma/COPD diagnoses, treated with corticosteroids.
• Average diagnostic delay was 36.8 months; 9/10 had audible turbulent airflow.
• Treatments (biopsy, laser excision, steroid injection, dilation) led to subjective and objective symptom relief.

Conclusions:

• Thorough history, physical exam, pulmonary function testing, and endoscopy expedite iSGS diagnosis.
• Audible abnormal upper airway sounds are crucial indicators for prompt diagnosis.
• Early recognition, particularly in female patients with turbulent airflow and poor bronchodilator response, is vital.