<prompt> Which of the following is not a feature of bronchial asthma?Thickening of bronchial wallIncrease in number of airway goblet cellsFibroblastic fociSub-basement membrane fibrosis  <response>: Fibroblastic foci exuberant proliferation of fibroblasts is a feature of idiopathic pulmonary fibrosis IPF. Bronchial asthma is an example of Type I Hypersensitivity reaction and is characterised by airway remodeling which includes: Thickening of bronchial wall with hyperophy andor hyperplasia of bronchial smooth muscles Increase in size of submucosal glands and number of goblet cells Increased vascularity Sub-basement membrane fibrosis due to deposition of type I and III collagens Key points - Sputum findings in bronchial asthma: Curshmann spirals - impacted mucin plugs Charcot Leyden crystals - Eosinophil crushing aefact Creola bodies - damaged respiratory epithelial cells 