FF-OCT features of normal skin structures and tumors:
1) Normal skin structures: On a low magnification view, all skin
layers including epidermis, dermis, and subcutis could be identified(Figure 1) . On a zooming-in, cellular details of each layer
became evident. The epidermis appeared as a grayish linear stratified
layer composed of multiple cells with a small dark nucleus and grayish
cytoplasm. However, due to the difficulties in flattening the tissue
edge completely on the imaging window, the epidermis could not be
visualized in most of the tissues.