Korean J Dermatol.  1983 Oct;21(5):491-498.

Histochemical Study of Incipient Psoriasis: The Changes of Acid Mucopolysaccharide and Mast Cells of the Dermis in Initial Lesions of Psoriasis


Twenty-eight cases of initial psoriasis were studied with histochemical methods in an attempt to obtain changes of acid mucopolysaccharides and mast cells. Early psoriatic lesions (pin head sized) and clinically uninvolved skin at distances of 2-4cm from the psoriatic lesions were excised respectively. The results are as follows; 1. Dermal changes were more prominent than the epidermal changes in almost all specimens in early psoriatic lesions. The main features of the dermal changes were perivascular inflammatory infiltrate which were consisted mainly of lymphoid cells. 2. Inflammatory infiltrate in the region of epidermal a.lteration and papillary edema is par ticulary striking. R. Among the 26 cases, the amount of acid mucopalysaccharides of initial lesion was lesser in 14 cases, greater in 4 cases and same in 8 cases as compared with clinically normal skin. 4. The number of mast cells of initial psoriatic lesion as compared with clinically normal skin was increased(p<0. 01).

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