Chronic plaque psoriasis

Question 1

features

Answer 1

erythematous plaques covered with a silvery-white scale

typically on the extensor surfaces such as the elbows and knees.

Also common on the scalp, trunk, buttocks and periumbilical area

clear delineation between normal and affected skin

plaques typically range from 1 to 10 cm in size

if the scale is removed, a red membrane with pinpoint bleeding points may be seen (Auspitz’s sign)