highly significantP < 0.001
The difference between the malignant and premalignant groups was highly significant ( P < 0.001). α-Smooth Muscle Actin-Positive SMF Staining Patterns Immunomorphometric measurements revealed that α-smooth muscle actin-positive SMF were scarce in cases of hyperplasia and dysplasia, irrespective of the severity of the latter (Fig. 1 a and b).