Pharyngobasilar fascia
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At the time the article was created Aaron Rayan had no recorded disclosures.
View Aaron Rayan's current disclosuresAt the time the article was last revised Rohit Sharma had no financial relationships to ineligible companies to disclose.
View Rohit Sharma's current disclosuresThe pharyngobasilar fascia is the part of the middle layer of deep cervical fascia that attaches the pharynx to the skull base. It originates between the mucosal and muscular layers of the pharynx and is the primary component of the pharyngeal wall above the level of the superior pharyngeal constrictor muscle.
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Gross anatomy
The pharyngobasilar fascia is a part of the middle layer of deep cervical fascia that surrounds the pharynx, along with the buccopharyngeal fascia.
The pharyngobasilar fascia provides structure to the lateral nasopharyngeal walls and helps maintain patency of the airway.
The sinus of Morgagni is a defect in the anterior aspect of the pharyngobasilar fascia, containing the eustachian tube and levator veli palatini muscle 4,8.
Attachments
superiorly: basilar part of occipital bone and petrous temporal bone
inferiorly: superior pharyngeal constrictor muscle
anteriorly: posterior border of medial pterygoid plate
posteriorly: midline pharyngeal raphe
Relations and/or Boundaries
The pharyngobasilar fascia lies between the levator and tensor veli palatini muscles 7. It is a submucosal plane, located between the mucosa and muscularis layers.
Related pathology
nasopharyngeal carcinoma must breach the pharyngobasilar fascia to spread into the masticator and parapharyngeal spaces, which is at least T2 disease (TNM staging) 5,6
See also
References
- 1. Susan Standring. Gray's Anatomy. (2015) ISBN: 9780702052309
- 2. Raymond Jack Last, Robert Matthew Hay McMinn. Last's anatomy, regional and applied. (1994) ISBN: 9780443046629
- 3. Som, P. M., & Curtin, H. D. (2003). Head and neck imaging (4th ed., Vol. 1-2). St. Louis, MO: Mosby.
- 4. Tubbs, Shane R. et al. “Quantification and Anatomy of the Sinus of Morgagni at the Skull Base.” (2015).
- 5. Hyare H, Wisco JJ, Alusi G, Cohen M, Nabili V, Abemayor E, Kirsch CF. The anatomy of nasopharyngeal carcinoma spread through the pharyngobasilar fascia to the trigeminal mandibular nerve on 1.5 T MRI. (2010) Surgical and radiologic anatomy : SRA. 32 (10): 937-44. doi:10.1007/s00276-010-0638-0 - Pubmed
- 6. Sakata K, Hareyama M, Tamakawa M, Oouchi A, Sido M, Nagakura H, Akiba H, Koito K, Himi T, Asakura K. Prognostic factors of nasopharynx tumors investigated by MR imaging and the value of MR imaging in the newly published TNM staging. (1999) International journal of radiation oncology, biology, physics. 43 (2): 273-8. doi:10.1016/s0360-3016(98)00417-9 - Pubmed
- 7. Silver AJ, Mawad ME, Hilal SK, Sane P, Ganti SR. Computed tomography of the nasopharynx and related spaces. Part I: Anatomy. (1983) Radiology. 147 (3): 725-31. doi:10.1148/radiology.147.3.6844608 - Pubmed
- 8. Teresi LM, Lufkin RB, Vinuela F, Dietrich RB, Wilson GH, Bentson JR, Hanafee WN. MR imaging of the nasopharynx and floor of the middle cranial fossa. Part I. Normal anatomy. (1987) Radiology. 164 (3): 811-6. doi:10.1148/radiology.164.3.3615883 - Pubmed
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