Maxillary sinus


noun, plural: maxillary sinuses

A large, pyramidal in shape, air-filled paranasal sinus within the body of the maxilla, communicating with the middle meatus of the nose on the same side.


It is the largest of the paranasal sinuses (other sinuses are frontal sinus, ethmoid sinus, and sphenoid sinus).

It is located just below the eyes, in the maxillary bones. It consists of three recesses:


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