INBDE (Integrated National Board Dental Examination) Practice Exam 2026 - Free Practice Questions and Study Guide

Question: 1 / 1180

Which fascial space is a fast route from cranial cavity to mediastinum?

Retropharyngeal space

One possible explanation could be The retropharyngeal space is a fascial space in the head and neck that provides a fast route for infections or cancer cells to spread from the cranial cavity to the mediastinum, which is the space in the thoracic cavity containing the heart, esophagus, and trachea. This pathway is faster compared to the other options mentioned, such as the sublingual, submandibular, or parapharyngeal spaces, as the retropharyngeal space is located directly behind the pharynx and connects to the mediastinum via the prevertebral fascia. Thus, this makes it easier for infections or cancer to spread quickly to the mediastinum.

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Sublingual space

Submandibular space

Parapharyngeal space

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