What is a precursor for stenosis?

What is a precursor for stenosis?

• A. Dilation
• B. Hypertrophy
• C. Calcification
• D. Sclerosis

Answer: (D)

Stenosis results from the tissue around an opening becoming stiff and thick, limiting flow. Sclerosis is the early hardening and thickening process of the valve leaflets or vessel walls. This stiffening reduces flexibility and sets the stage for narrowing. As sclerosis progresses, calcific deposits often accumulate, further restricting motion and enlarging the obstruction, which leads to stenosis. So sclerosis is the initial change that paves the way for the obstructive state. Dilation would tend to widen the lumen rather than narrow it. Hypertrophy is about thickening of a muscle wall from increased workload, not the initial stiffening of the valve or vessel that precedes stenosis. Calcification contributes directly to narrowing, but it typically represents a later, more advanced change following sclerosis.

Stenosis results from the tissue around an opening becoming stiff and thick, limiting flow. Sclerosis is the early hardening and thickening process of the valve leaflets or vessel walls. This stiffening reduces flexibility and sets the stage for narrowing. As sclerosis progresses, calcific deposits often accumulate, further restricting motion and enlarging the obstruction, which leads to stenosis. So sclerosis is the initial change that paves the way for the obstructive state.

Dilation would tend to widen the lumen rather than narrow it. Hypertrophy is about thickening of a muscle wall from increased workload, not the initial stiffening of the valve or vessel that precedes stenosis. Calcification contributes directly to narrowing, but it typically represents a later, more advanced change following sclerosis.