Rahul Sharma (Editor)

Danger space

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Dorlands/Elsevier  12745223
Danger space 11a Neck I Gross Anatomy with Bai at University of Maryland

Similar  Pterygomandibular raphe, Parapharyngeal space, Retropharyngeal space

The danger space or alar space, is a region of the neck. The common name originates from the risk that an infection in this space can spread directly to the thorax, and, due to being a space continuous on the left and right, can furthermore allow infection to spread easily to either side.


Danger space cervical fascia

Q5. In the given diagram identify the danger space (AIIMS 2016)


Danger space posterngnetkeyatesrviewingindexphpmodulevi

It is bounded superiorly by the skull base, anteriorly by the alar fascia and posteriorly by the prevertebral fascia. It comes to an end at the level of the diaphragm.

Danger space Danger space Wikipedia

The retropharyngeal space is found anterior to the danger zone, between the alar fascia and buccopharyngeal fascia. There exists a midline raphe in this space so some infections of this space appear unilateral.


Danger space Neck Anatomy Medical Illustration

On CT or MRI it is only visible when distended by fluid or pus, below the level of T1-T6, as the retropharyngeal space ends at this level, allowing distinction between the two entities.


It was first characterized in 1938.

Danger space B0205 Root of Neck and Cervical Viscera at American University of


Danger space Wikipedia