<prompt> Hoarse with typical barking cough and biphasic stridor are feature in which site of lesion isLarynxHypopharynxTracheaPharynx  <response>: A. i.e. Larynx 717-BL 25thLARYNGOTRACHEO BRONCHITIS CROUP Most commonly in children under 2 years of age Usually viral in origin The children have biphasic stridor and are often hoarse with a typical barking cough Air way intervention is required less oftenAcute epiglottitis - Stridor is usually associated with drooling of salivaDifferences between acute epiglottitis and acute larybngo-tracheo bronchitis in children 267-Dhingra 4th Acute epiglottitisSupraglottic LaryngitisAcute laryngotracheobronchitis Causative organismH. influenzae type BPara influenza virus type I II Age2-7 years3 months to 3 years PathologySupraglottic larynxSub glottic area Prodromal symptomsAbsentPresent OnsetSuddenSlow FeverHighLow grade or no fever Patientss lookToxicNon - Toxic CoughUsually absentPresent Barking seal like OdynophagiaPresent with drooling of secretionsUsually absent StridorPresent and may be markedPresent RadiologyThumb sign on lateral viewSteeple sign on AP view of neck TreatmentHumidified oxygen, third generation cephalosporins Ceftriaxone or amoxicillineHumidified oxygen tent, steroids. LARYNGEAL DIPHTHERIA Very toxaemic with tachycardia and thready pulse Hoarse voice, croupy cough. Inspiratory stridor, increasing dyspnoea wth marked upper airway obstruction Greyish white membrane is seen in the tonsil, pharynx and soft palate Bull-neck cervical lymphadenopathyComplications Asphyxia and death due to airways obstruction. Toxic myocarditis and circulatory failure, palatal paralysis with nasal regurgitation, Laryngeal and pharyngeal paralysis. 