Violation

Mucosal thickening in the maxillary sinus 1. may fill the entire air space of the sinus. 2. is often usually an incidental radiographic finding. 3. may be caused by a periapical infection. 4. may be associated with nasal discharge.

All of the above.

(1) (2) (3)

(4) only

(2) and (4)

(1) and (3)

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