Structure of the lateral mass of the ethmoid by curved stacking of endoturbinal elements

Abstract

The onion structure of the lateral masses of the ethmoid can be observed on coronal CT scans. This structure confirms evo-devo theory. The ethmoid thus appears fundamentally different from the paranasal sinuses, suggesting that the pathogenesis of nasal polyposis and ethmoidectomy techniques need to be reconsidered.

Anosmia following middle nasal concha resection: An anatomic and developmental review with clinical correlation

“…A challenge for modern day trained rhinologist in accepting the evo‐devo approach may relate to the modern teaching that the ethmoid labyrinth is formed from ethmoid cells, which are air filled spaces each with its own opening into the nasal cavity and that the other sinuses arise from the ethmoid. This is quite different than the evo‐devo approach, which says the maxillary, sphenoid, and frontal sinuses do not arise from the ethmoid but from post‐natal degeneration of bone with pneumatization and that the ethmoid sinus is not technically a sinus (Jankowski et al, 2016). Given that otolaryngologists and rhinologists are mostly exposed to human sinonasal embryology through educational materials prepared by clinicians teaching sinonasal surgery, the evo‐devo approach can be challenging for modern day rhinologists to grasp initially.…”

Endoscopic balloon dilatation of the olfactory cleft – a feasibility study of a novel technique in cadavers

“…It should be reiterated that further studies are required to ensure repeatability and veracity of the results. Nevertheless, the ability to dilate the olfactory cleft, as demonstrated in this study, opens the real possibility of offering patients who suffer from olfactory dysfunction (e.g., hyposmia) a minimally invasive intervention to maximise penetration of topical medication such as corticosteroids into this area, which is abundant with olfactory mucosa 11 . Patients with post-viral olfactory dysfunction who have not improved with conventional treatments (e.g., topical intranasal steroid) may be a specific patient group to potentially benefit from this intervention.…”

The evo‐devo origins of the nasopharynx

“…This wrongly suggests that the human nose is a single organ. The olfactory nose, located above the respiratory nose, is in fact formed by the basicranial receptacle of the olfactory mucosa that is the ethmoid bone (Jankowski, 2011; Jankowski, Perrot, et al, 2016; Jankowski, Rumeau, et al, 2016) and by two ducts posteriorly positioned side by side, differentiated from the walls of the embryonic olfactory wells in several anatomical elements (alar cartilages, septolateral cartilages [Varoquier et al, 2021], and fibrous fascia) altogether constituting the olfactory fascia (Jankowski, Perrot, et al, 2016; Jankowski, Rumeau, et al, 2016).…”