“…Specifically, the white color of psoriatic scales is of particular value for the diagnosis of psoriasis compared with the yellow scales or crusts that are usually suggestive of dermatitis [ 15 ]. Several treatments have been used in the literature: topical strong to very strong topical steroid, calcipotriol, tacrolimus, vitamin A derivatives, salicylic acid, and methotrexate with good outcome in most cases [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”