Short-duration dithranol therapy for psoriasis.

40 outpatients with psoriasis vulgaris of limited extent were treated with daily brief applications of a 1, 2 or 3% dithranol ointment. The treatment was effective in cases of large plaques, small lesions and guttate psoriasis. There was a very poor therapeutic response in palmoplantar psoriasis and in residual lesions after Ingram's regimen.