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The Egyptian Journal of Otolaryngology
Fig. 1 | The Egyptian Journal of Otolaryngology

Fig. 1

From: Endoscopic-assisted approaches for enucleation of invaded sinonasal region by benign odontogenic cysts: a case series study

Fig. 1

Relationship between the origin of odontogenic cysts and direction of expansion of the maxillary walls. A Cysts originating from the central incisors with the direction of expansions (arrow). B Coronal CT image of a periapical cyst, showing an expansive process displacing the nasal cavity floor (black arrow) with intact and sclerotic borders. C Cysts originating from the lateral incisors and canines with directions of expansion (arrows). D Coronal CT image of a periapical cyst of the maxilla originating from non-vital left canine, showing an expansive process displacing part of the nasal cavity floor, inferior turbinate, and maxillary sinuses, with intact and sclerotic borders and occupying the majority of the left maxillary sinus (arrows). Associated pan rhinosinusitis was also observed. E Cysts originating from premolars and molars with the direction of displacements of the maxillary sinus floor (arrow). F Coronal CT image of a radicular cyst originating from the right second molar, expanding, and occupying the majority of the left maxillary sinus (arrow) with a very thin sclerotic border (arrow)

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