Figure 2: Biopsy from hip, edge of the lesion. (a) Histopathologic examination showed hyperkeratosis, parakeratosis and acanthosis (H&E,×10). (b) A thickened column of keratin containing parakeratotic nuclei extending outward from notch in the malpighian layer (H&E,×40). (c) The keratinocytes beside parakeratosis cells are morphologically normal (H&E,×40).