The upward extension of thyroid swelling is prevented by which of the following structure attached to thyroid cailage: (A) Sternothyroid, (B) Pretracheal fascia, (C) Ligament of berry, (D) Thyrohyoid membrane
Answer is B. 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