system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which one of the following conditions is considered to be definitely precancerous in the larynx?
assistant
The correct answer is  (c) Leukoplakia(Ref. Cummings, 6th ed., 1609)Rest are not precancerous.Subglottic hemangiomas are benign vascular tumours. They are rare as such but can lead to progressive stridor. They are commonly associated with cutaneous hemangiomas (the most common benign skin vascular tumours in children). Most subglottic hemangiomas spontaneously resolve by 5 years of age. If large and progressive they can be excised by CO2 LASER or surgically.