Author: Dr Ben Tallon, Dermatologist/Dermatopathologist, Tauranga, New Zealand, 2011.
This benign lesion is grouped within the cutaneous cysts
Scanning power view demonstrates a unilocular cystic structure within the dermis (Figure 1). Higher power reveals a thin epithelial lining with a retained granular layer (Figures 2 and 3). Within the cyst cavity are loose keratin fragments and numerous pigmented terminal hair shafts (Figures 2 and 3).
Vellous hair cyst: In this lesion the cyst cavity contains small vellous hairs lacking pigmentation.
Epidermal inclusion cyst: Hair fragments are absent.
© 2018 DermNet New Zealand Trust.
DermNet NZ does not provide an online consultation service. If you have any concerns with your skin or its treatment, see a dermatologist for advice.