Figure 1.

Histology of lip tissue under this study. The tissue obtained from subject 2 was stained with hematoxylin and eosin. (a) Whole tissue section showing the skin, epithelium of the vermilion, and its underlying tissue. Magnified view of (b) the skin showing the hair follicle (indicated by yellow arrow) and sebaceous glands (indicated by red arrows). Magnified view of (c) the epithelium of the vermilion, and its (d) underlying tissue. Areas encircled by blue, red, and yellow rectangles in (a) were used for magnification for the skin, epithelium of the vermilion, and its underlying tissue, respectively.