A child with three days history of upper respirotory tract infection presents with stridor, which decreases on lying down postion. What is the most probable diagnosis: (A) Acute Epiglottitis, (B) Laryngotracheobronchitis, (C) Foreign body aspiration, (D) Retropharyngeal abscess
Answer is B. Biphasic stridor usually originates from subglottic or proximal tracheal lesions. laryngotracheobranchitis presents in children of 1-5 years of age with biphasic stridor,brassy cough&low grade fever. Ref : Essential Paediatrics,O.P.Ghai,7 th edition,Pg No:339