<prompt> Which of the following is precancerous lesion -Pachydermia of larynxLaryngitis siccaKeratosis of larynxScleroma larynx  <response>: Lichen planus has no malignant potential.Papilloma The malignant transformation from benign non keratining squamous papilloma to squamous cell carcinoma can occur in children, but is rarely seen Leukoplakia is a white patch, in which there is epithelial hyperplasia along with atypical cells. It is a premalignant condition. Another name for leukoplakia is hyperkeratosis dyskeratosisSmoking is a predisposing factor, not a premalignant condition. y In some cases of chronic laryngitis, the laryngeal mucosa becomes dysplastic particularly over true vocal folds and is a premalignant condition.Chronic inflammatory conditions of larynx like chronic laryngitis may develop into malignancy.Keratosis of larynxleukoplakia:- It is epithelial hyperplasia of the upper surface of one or both vocal cords.Appears as a white plaque or warty growth on cord without affecting its mobilityRegarded as a precarcerous condition as Ca in situ develops frequentlyTt stripping of cords 