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A myofibroblast is a cell phenotype that was first described as being in a state between a fibroblast and a smooth muscle cell.

Structure

Myofibroblasts are contractile web-like fusiform cells that are identifiable by their expression of ?-smooth muscle actin within their cytoplasmic stress fibers.

In the gastrointestinal and genitourinary tracts, myofibroblasts are

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