Figure 1.

Latency period of malignant transformation analysis. A, MU's post‐ulceration period is negatively correlated with its pre‐ulceration period. B, C, The latency period and pre‐ulceration period of primary lesion caused by infection is significantly longer than that by burn or trauma/surgery. D, Incomplete healing wounds experienced a significantly shorter latency period than other ulcerations occurring on scar. E, F, No significant difference of latency period was found between patients with and without scar contracture, nor between patients with and without repeated rupture. *P < 0.05; **P < 0.01; NS, P > 0.05