What does this mean, results from my CT SCAN - The right maxillary sinus demonstrates mild frothy secretions dependently. The right maxillary sinus o?

Nothing without Sx. To discuss your CT scan findings, we need to know 1) your symptoms & 2) working diagnoses. The doctor who ordered the CT scan knows both. Use Prime if you want to discuss on HealthTap. Literally: the "maxillary sinus" is the air space beneath the cheekbone. "Frothy" refers to air bubbles in a fluid (mucus), seen in the lower (gravity-"dependent") portions of the sinus. Sinuses normally make mucus.