Table 2.

LC-OCT: main features of BCC and hidrocystomas [31].

BCC	Hidrocystoma
Lobule	Hyporeflective cupoliform area
Structure of variable shape, size and location within the dermis, with a gray core surrounded by a darker rim. The Millefeuille pattern corresponds to a grey, laminated LC-OCT pattern within the lobule, horizontally oriented. Clefting represents a dark rim surrounding the core of the lobule, while a bright rim (brighter than the stroma) often surrounds the lobule.	Well-defined area, delimited by a bright and thick upper contour, corresponding to the top of the hidrocystoma. The content of the lesion is filled with a completely homogeneous hyporeflective material. A thick hyperreflective contour surrounds the cupoliform structure.
Vascular structures	Vascular structures
Well-defined, hyporeflective vessels of various shapes/size, located within the dermis and especially next to lobules.	Dilated vessels situated above the cupoliform area, not consistently visible.
Epidermal changes	Epidermal changes
Parakeratosis, disorganized epidermis.	Not detected.
Bright cells within epidermis/lobules	Bright cells within epidermis/lobules
Hyperreflective structures within the epidermis and/or the lobules.	Not detected.