HCG18 and pachyonychia congenita: Among all the 28 lncRNAs, only H19, HCG18, NUTM2A‐AS1, NR2F1‐AS1, HOXA11‐AS, PRKCQ‐AS1, SLC16A1‐AS1, and AC005519.1 were significantly upregulated, and AL158206.1, HIPK1‐AS1, VASH1‐AS1, AC004812.2 were downregulated in PC.