Sinus

What does "Sinus" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

In the field of medicine, "sinus" refers to a hollow space or cavity within the body. Most commonly, it is used to describe the small, air-filled cavities located within the bones of the face and skull, around the nose. These sinuses are lined with a soft, pink tissue called mucosa and are connected to the nasal passages. They help to warm, moisten and filter the air we breathe in, among other functions.

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