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Ultrasonographic image of a healthy nail: transverse (A,C) and longitudinal view (B,D). Nail plates presented as a structure consisting of two parallel hyperechoic plates separated by a hypoechoic interlaminar space. Nail matrix presented as an isoechogenic structure in the proximal part of the nail. Nail bed presented as a hypoechoic structure between the ventral nail plate and the periosteum of the distal phalanx.
