Assertion: frontal sinus | /r/HasProperty | affected
Facets:
value: rarely
type: DEGREE
Source sentences:
text: frontal sinuses are affected due to obstruction of the ostiomeatal complex
text: : maxillary sinus, anterior ethmoid air cells, and frontal sinuses are affected due to obstruction of the ostiomeatal complex infundibular pattern : isolated obstruction to the ethmoid infundibulum and/or maxillary sinus ostium
text: The frontal sinuses are less often involved and the sphenoid sinuses are rarely affected.