What structure connects the thyroid to the pharynx and regresses after the gland reaches its normal position in the neck?

What structure connects the thyroid to the pharynx and regresses after the gland reaches its normal position in the neck?

• A. Thyroglossal Duct Cyst
• B. Foramen cecum
• C. Thyroglossal duct
• D. Pyramidal lobe

Answer: (C)

The connecting structure is the thyroglossal duct. During development the thyroid begins near the base of the tongue at the foramen cecum and migrates down to its position in the neck along this transient duct. The duct normally involutes and disappears once the gland reaches its final site. If it doesn’t regress completely, remnants can persist and form a thyroglossal duct cyst. The foramen cecum is simply the tongue’s opening of the tract, not the duct itself. The pyramidal lobe is an occasional upward extension of thyroid tissue from the isthmus, not the conduit that links the thyroid to the pharynx.

The connecting structure is the thyroglossal duct. During development the thyroid begins near the base of the tongue at the foramen cecum and migrates down to its position in the neck along this transient duct. The duct normally involutes and disappears once the gland reaches its final site. If it doesn’t regress completely, remnants can persist and form a thyroglossal duct cyst. The foramen cecum is simply the tongue’s opening of the tract, not the duct itself. The pyramidal lobe is an occasional upward extension of thyroid tissue from the isthmus, not the conduit that links the thyroid to the pharynx.