Mucosal pharyngeal space

The pharyngeal mucosal space (PMS) lies just lateral and posterior to the nasopharynx and oropharynx.

Boundaries:

• Middle layer of the deep cervical fascia posteriorly and laterally.
• Cricoid cartilage inferiorly
• Base of skull superiorly

Relations:

• Retropharyngeal space posteriorly
• Parapharyngea] space laterally

Contents:

• Pharyngeal mucosa
• Lymphoid tissue of Waldeyer's ring(tonsils and adenoids)
• Minor salivary glands
• Superior and middle pharyngeal constrictor muscles 

Sources:

The pharyngeal mucosal, parapharyngeal, and retropharyngeal spaces-  Kimura, Y. & Okano, T. Oral Radiol. (2003) 19: 4. https://doi.org/10.1007/BF0249323