Posteriorly it is bordered by carotid sheath posteriolaterally and the retropharyngeal space posteriomedially. The lateral aspect is more involved, and is bordered by the ramus of the mandible, the deep lobe of the parotid gland, the medial pterygoid muscle, and below the level of the mandible, the lateral aspect is bordered by the fascia of the posterior belly of digastric muscle. These anatomical boundaries make it continuous with the retropharyngeal space.