Pediatrics Respiratory System febf9daa All are common causes of stridor except: A Foreign body in larynx and trachea B Laryngomalacia C Atrophic laryngitis D Multiple papillomas of larynx High-Yield Explanation c. Atrophic laryngitis(Ref: Nelson's 20/e p 2113-2116)Atrophic Laryngitis usually manifests with hoarseness & irritable cough; Rest 3 conditions can manifest as stridor.