Leukocyte migration in vivo and in vitro in patients with psoriasis.

Leukocyte migration in vivo was studied with a skin chamber technique in 21 patients with active psoriasis vulgaris and 18 with cleared psoriasis vulgaris. Measuring over 24 h, no difference was found between healthy volunteers and most patients with active psoriasis, although a subgroup of patients with long-lasting relapses showed subnormal migration values. In patients with cleared psoriasis on the other hand the in vivo leukocyte migration values were increased. In addition, leukocyte migration in vitro under agarose was studied, but no difference was found between healthy controls and patients with psoriasis, active or cleared.