What does "Extension" 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.
"Extension" in a medical document often refers to the movement of a joint. In simpler terms, it's when a part of the body, like an arm or leg, is straightened or moved away from the rest of the body. For example, when a person stands up straight from a bent position, they are extending their knees and hips.
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