Scaling disorders

Question 1

Psoriasis- Eti

Answer 1

Affects 2% population- chronic disorder, polygenic disposition- environmental triggers. Due to shortening of keratin lifecycle

Question 2

Psoriasis- Sx

Answer 2

Silvery scales on bright red, well demarcated plaques. Extensor surfaces. Mild itching, pitting and onycholysis of nailbed

Question 3

Psoriasis- Dx

Answer 3

Clinical findings

Question 4

Psoriasis- Tx

Answer 4

Topical corticosteroids, tar shampoo for scalp, methotrexate and UV therapy

Question 5

Pityriasis rosea- Eti

Answer 5

Acute exanthematous eruption- common in spring to fall and young adults

Question 6

Pityriasis rosea- Sx

Answer 6

Herald patch proceeds eruption. Oval, fawn/salmon colored scaly eruption with central cigarette paper appearance. Christmas tree pattern

Question 7

Pityriasis rosea- Dx

Answer 7

Clinical findings of classical presentation

Question 8

Pityriasis rosea- Tx

Answer 8

Antihistamines, topical glucocorticoids, UVB treatments

Question 9

Seborrheic dermatitis- Eti

Answer 9

2-5% population, occurs in males, hereditary. Commonly occurs with psoriasis. Life long recurrences

Question 10

Seborrheic dermatitis- Sx

Answer 10

Scalp, central face, body folds and umbilicus. Dry scales, underlying erythema with oily yellowish macules or patches

Question 11

Seborrheic dermatitis- Dx

Answer 11

Clincical

Question 12

Seborrheic dermatitis- Tx

Answer 12

Selenium sulfide/ tar shampoo, ketoconazole, corticosteroid

Question 13

Lichen planus- Eti

Answer 13

Common chronic pruritic skin disease- immunologic inflamatory dermatoses

Question 14

Lichen planus- Sx

Answer 14

Purple, polygonal, pruritic papule- flexural surfaces. May affect mouth

Question 15

Lichen planus- Dx

Answer 15

Clinical, confirmed by biopsy. Band like infiltration of lymphocytes in dermis on biopsy

Question 16

Lichen planus- Tx

Answer 16

Superpotent corticosteroids, topical tacrolimus, systemic corticosteroids

Question 17

Icthyosis- Eti

Answer 17

Hereditary disorder (rare, multi organ disease) or acquired depending on subtype.

Question 18

Icthyosis- Sx

Answer 18

Accumulation of cutaneous scale, xerosis, diffuse involvement. Worse in winter

Question 19

Icthyosis- Tx

Answer 19

Hydration therapy, systemic retinoids