《Slide 182.》Psoriasis vulgaris, Skin

A. Brief Descriptions：

1. Common chronic inflammatory dermatosis.

2. Elbow, knees, scalp, lumbosacral area, intergluteal cleft, glans penis.

3. Well-demarcated, pink to salmon-colored plaque covered by loosely adherent  scales.(Auspitz sign) 

B. Gross Findings：

略.

C. Micro Findings：

1. Epidermal hyperplasia with elongation of the rete ridge.

2. Stratum granulosum: thinned or absent with dilated, tortuous blood vessels within these papillae.

3. Parakeratotic scales with microabscess of neutrophils within the superficial epidermal layer. (Munro microabscess) .

D. Others：

略.

E. Reference：

1. Robbins pathologic basis of disease. Ch27. p.1199.

 

【 Fig. 182-1 (4X)】

　

 

 

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【 Fig. 182-6 (40X)】