What does "Just posterior to the right sternocleidomastoid muscle" 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.
This phrase is describing a location in the body. The right sternocleidomastoid muscle is a large muscle in the neck that helps with head movement. When something is "just posterior" to this muscle, it means it's located just behind it. So, "just posterior to the right sternocleidomastoid muscle" is referring to a spot just behind this large neck muscle on the right side of the body.
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