Survival analysis revealed that expression levels of CCND1, MMP1, CREG1, CRYAB, FILIP1L, IFNG, TNFAIP2, TNFAIP3, and VIM had an impact on the prognosis of PC patients with p values < 0.05 (Figure 2(c)). The gene discussed is MMP1; the disease is pachyonychia congenita.