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Neck
Published in Swati Goyal, Neuroradiology, 2020
The RPS is confined anteriorly by the visceral fascia and posteriorly by the prevertebral fascia. A thin alar fascia layer divides the RPS into anterior and posterior compartments. The posterior compartment (danger space) continues from the skull base to the diaphragm. It is a channel for the cranial and cervical infection and tumors to extend into the mediastinum.
Anatomy and differential diagnosis in head and neck surgery
Published in Neeraj Sethi, R. James A. England, Neil de Zoysa, Head, Neck and Thyroid Surgery, 2020
Its posterior margin is the alar fascia, which separates the retropharyngeal space from the danger space. The clinical relevance is that the danger space runs from the clivus to the mediastinum. This can result in infection spreading from the pharynx into the mediastinum leading to mediastinitis.
Paediatric deep neck space infections
Published in S. Musheer Hussain, Paul White, Kim W Ah-See, Patrick Spielmann, Mary-Louise Montague, ENT Head & Neck Emergencies, 2018
The danger space is also worthy of mention, just posterior to the retropharyngeal space lying between the alar fascia and the prevertebral fascia and extending from the skull base into the posterior mediastinum down to the level of the diaphragm, creating a potential pathway for widespread infection (Figure 23.2). Infection in this space presents initially in an almost identical fashion to retropharyngeal space infection.
Upgraded hydrodissection and its safety enhancement in microwave ablation of papillary thyroid cancer: a comparative study
Published in International Journal of Hyperthermia, 2023
Zhen-Long Zhao, Ying Wei, Li-Li Peng, Yan Li, Nai-Cong Lu, Jie Wu, Ming-An Yu
In the present study, a total of three anatomical perithyroidal fascial spaces were hydrodissected with an improved protocol for separating thyroid lobes far from adjacent vital structures and guaranteeing a safe procedure. These spaces included: (1) the anterior cervical space (ACS), which is located between the infrahyoid muscles (infrahyoid fascia) and thyroid (visceral fascia), and could protect infrahyoid muscles and the carotid sheath from heat injury after hydrodissection; (2) the visceral space (VS), which is between the thyroid and trachea and could protect the trachea, esophagus, RLN, and superior laryngeal nerve (SLN) after hydrodissection; and 3) the post-thyroid space (POTS), which is posterior to the thyroid and carotid sheath and includes the retropharyngeal space and/or danger space (surrounded by the alar fascia, buccopharyngeal fascia, and prevertebral fascia); this space could protect the carotid sheath, RLN and stellate ganglion. The VS at the level of the suspensory ligament of the thyroid gland could not be hydrodissected because of the suspensory ligament. A schematic of the spaces is shown in Figure 2.