Cyst Ethmoid Ethmoid Sinus Mucous Retention Cyst Mucous Retention Sinus Ethmoid Sinus Mucous Retention Cyst MarhtyuettahtyuiSalas Monday, March 6, 2017 Rathke cleft cyst assessment, radiography, computed tomography. Summary. The maxillary sinus is the paranasal sinus that impacts maximum on ...