INBDE (Integrated National Board Dental Examination) Practice Exam

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What are located laterally along the anterior border of SCM and are remnants of these clefts?

  1. Branchial cysts and sinuses

  2. Laryngeal cartilages

  3. Pharyngeal pouches

  4. Tonsillar crypts

The correct answer is: Branchial cysts and sinuses

Branchial cysts and sinuses are located laterally along the anterior border of the sternocleidomastoid muscle (SCM), as these structures are remnants of the branchial clefts. Laryngeal cartilages (B) are located anteriorly to the SCM, not laterally. Pharyngeal pouches (C) are located on the medial wall of the pharynx, not along the SCM. Tonsillar crypts (D) are not located near the SCM, as they are found on the tonsils at the back of throat. The best option is A because it directly refers to the structures that are located along the SCM and explains their origin.

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