International Licensing Examination (ILE) Practice Test

What condition refers to the absence of the external auditory canal?

1. Otosclerosis

2. Atresia

3. Microtia

4. Tinnitus

The correct answer is: Atresia

The condition that refers to the absence of the external auditory canal is indeed Atresia. In the context of ear anatomy and conditions, atresia is specifically characterized by the incomplete or total failure of the external auditory canal to develop properly. This can lead to hearing loss as sound waves cannot effectively reach the eardrum. To clarify the context of the other choices: Otosclerosis involves a change in the bone structure of the middle ear, which can affect hearing but does not specifically address the absence of the external auditory canal. Microtia refers to an underdeveloped or small external ear but does not necessarily indicate the absence of the canal itself; microtia can occur with or without atresia. Tinnitus is a symptom characterized by ringing or other noises in the ears, which is unrelated to the structure of the ear canal. Understanding these distinctions helps in accurately identifying and discussing conditions related to ear anatomy and their implications for hearing health.