Head and Neck Anatomical Structures · USMLE Step 1

A child presents with recurrent middle ear infections. Which structure connects the nasopharynx to the middle ear and equalizes pressure?

  1. External auditory canal
  2. Eustachian tube
  3. Oval window
  4. Round window
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Correct answer: Eustachian tube

The Eustachian (pharyngotympanic) tube connects the middle ear to the nasopharynx. It helps equalize pressure but can allow infections to spread.

Difficulty: Medium Question 19 of 20

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