Histological Comparison of Two Cryopeeling Methods for Photodamaged Skin

Table 1

Histological findings are summarized. Epidermal and Grenz zone thicknesses values were obtained by average of three measurements. Pigment intensity score was based on a weighted average considering intensity and distribution of pigment. The intensity of pigment decreased after PS treatment (P = 0.025).

	Before treatment	After treatment	n	P
Epidermal thickness average (μm)
LN	39.34 (SD 7.83)	43.37 (SD 9.40)	16	0.09
PS	38.26 (SD 6.52)	42.28 (SD 8.24)	15	0.13
Grenz zone thickness average (μm)
LN	61.41 (SD 29.50)	64.37 (SD 18.07)	16	0.71
PS	71.08 (SD 25.98)	80.58 (SD 37.04)	15	0.36
Pigment intensity score
LN	75.42 (DP 13.27)	71.88 (DP 17.68)	16	0.54
PS	69.55 (DP 11.04)	58.89 (DP 12.39)	15	0.025

LN: liquid nitrogen. PS: portable system. SD: standard deviation.