What does "Sac" 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.
In medicine, "sac" usually refers to a part of the body that has the shape of a bag or pouch. It can be a natural part of the body, like the sac that holds the heart (pericardial sac) or a part of the eye (conjunctival sac). Sometimes, it can also refer to an abnormal growth or formation, like a cyst or a blister, which can fill with fluid or other substances.
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