2. Psoriasis
Affects 2 % to 3 % of the population
One of the “miseries that beset mankind”
Genetic defect with polygenic inheritance
Trigger Factors:
Physical trauma (Koebner’s phenomenon)
Infections
Stress
Drugs
4. Psoriasis
Classification
Non pustular forms
Plaque psriasis
Guttate psoriasis
Psoriatic arthritis
Pustular forms
Pustular psoriasis
Pustolosis palmaris et plantaris
Erythrodermic psoriasis
Von Zumbusch
5. Psoriasis Vulgaris
Characterized by silvery white scaly plaques
mainly on the extensor surfaces
Positive Auspitz’s sign.
Flexural forms are wet and erythematous
19. Psoriasis
Treatment should be individualized
based on patients’ age, type of
psoriasis, site and extent of
involvement, previous treatment,
associated medical disorders.
22. Prognosis
Psoriasis is incurable disease.
The prognosis for control is good
in good setups and patients have
decreased quality of life and more
or less normal life expectancy
23. Pityriasis Rosea
Common acute exanthematous eruption with a
distinctive morphology
Cause unknown. HHV-7 is suspected
A single herald patch precedes the
exanthematous phase
Oval, slightly raised plaque 2 to 5 cm, bright
red, fine collarette scale at periphery on the
trunk, is followed by generalized plaques that
forms x-mas tree appearance.
30. Lichen Planus
A unique, common inflammatory
disorder that affects the skin, mucous
membranes, nails, and/or hair.
Cause is unknown
Pruritic, violaceous, flat-topped,
polygonal papules are seen in any
part of the skin
