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
The upward extension of thyroid swelling is prevented by which of the following structure attached to thyroid cailage
assistant
The correct answer is  Pretacheal fasciaprevents upward extension of thyroid swelling. It goes antero-lateral to trachea and continues posteriorly around oesophagus and as pharynx as buccopharyngeal fascia. It encloses: Trachea and oesophagus Thyroid gland Ant. Neck muscles