M.D.
I googled it & treatments were as follows:
Treatments to date have included class-1 topical glucocorticoids, tacrolimus 0.1 percent ointment, topical and oral vitamin A, calcipotriene 0.005 percent ointment, liquor carbonis detergens 5 percent in triamcinolone 0.1 percent ointment, urea 20 percent cream, and emollients, with minimal to no response. Broad-band ultraviolet B phototherapy was recently initiated.
there are alot of websites out there with lots of information. www.emedicine.com had some good stuff