Jarrett Paul, Sutton Timothy
The Skin Centre, Tauranga, New Zealand.
Australas J Dermatol. 2007 Feb;48(1):57-9. doi: 10.1111/j.1440-0960.2006.00338.x.
A 66-year-old woman presented with a 40-year history of a slowly enlarging erythematous patch on the left thenar eminence. Histopathology showed a sharp 'step' between the uninvolved and involved skin. Epidermal dysplasia and a cornoid lamella were not seen. These are the typical features of circumscribed palmar hypokeratosis.