What does "Right lateral thecal 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.
The term "right lateral thecal sac" refers to a specific part of the spine. The thecal sac is a protective covering that surrounds the spinal cord and contains fluid that helps cushion the cord. When the term "right lateral" is used, it's referring to the right side of this protective covering.
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