Neck: danger space and mediastinitis: practice question

A ENT question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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ENT · Neck: danger space and mediastinitis

Sample item

A diabetic patient with a retropharyngeal infection develops chest pain, fever and widened mediastinum on chest radiograph. Which fascial space connects the neck to the posterior mediastinum?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

C. Danger space between the alar and prevertebral fasciae

The danger space lies between the alar and prevertebral layers of deep cervical fascia and extends from the skull base to the diaphragm, giving direct spread of infection into the posterior mediastinum. The retropharyngeal space ends at about T1 to T2. Descending necrotising mediastinitis is life-threatening.

Option by option

  • A. Carotid sheath only

    The carotid sheath also passes to the chest but is not the classic route from retropharyngeal infection.

  • B. Masticator space

    The masticator space is in the face.

  • C. Danger space between the alar and prevertebral fasciae (correct)

    Correct. This space runs from the skull base to the diaphragm.

  • D. Pretracheal space

    The pretracheal space leads to the anterior mediastinum.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this ENT question

What is the answer to this ENT question?

The best answer is C, Danger space between the alar and prevertebral fasciae. The danger space lies between the alar and prevertebral layers of deep cervical fascia and extends from the skull base to the diaphragm, giving direct spread of infection into the posterior mediastinum.

Why is "Carotid sheath only" not the answer?

The carotid sheath also passes to the chest but is not the classic route from retropharyngeal infection.

Why is "Masticator space" not the answer?

The masticator space is in the face.

Why is "Pretracheal space" not the answer?

The pretracheal space leads to the anterior mediastinum.

What concept does this question test?

It tests Neck: danger space and mediastinitis in ENT. The retropharyngeal space ends at about T1 to T2. Descending necrotising mediastinitis is life-threatening.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Neck: danger space and mediastinitis?

Learn tuning fork results and audiogram patterns by sketching them. Then use the flashcards and the other ENT questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.