What does "Flattening of the ventral 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.
"Flattening of the ventral thecal sac" refers to a change in the shape of a part of the spine. The thecal sac is a protective covering that surrounds the spinal cord, and 'ventral' refers to the front side of this sac. When it's said to be 'flattened', it means that it's not as round or full as it normally is, often due to pressure from something else in the spine area.
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