Dark and Light Rashes

Question 1

hyperpigmented scaly macules on the upper chest and back can be significant for. less common on the face

Answer 1

• tinea versicolor

Question 2

what test do you do to rule in tinea versicolor

Answer 2

• KOH exam

Question 3

what do you see on a KOH exam with tinea versicolor

Answer 3

• pseudohyphae - round spores of malassezia

Question 4

what happens with tinea versicolor when you start rubbing off for KOH exam. what do you see?

Answer 4

• scale

Question 5

tinea versicolor in light skin types is hyper/hypopigmented

Answer 5

• hyperpigmented

Question 6

tinea versicolor in dark skin types is hyper/hypopigmented

Answer 6

• hypopigmented

Question 7

treatment of tinea versicolor

Answer 7

• anti-dandruff or Ketoconazole shampoo - later and hold for 10-15 minutes

Question 8

treatment of tinea versicolor for limited disease

Answer 8

• azoles creams for 2 weeks

Question 9

treatment of tinea versicolor for widespread diseaes

Answer 9

• one time dose of oral fluconazole

Question 10

what is characterized by patchy light to dark brown pigmentation of the face

Answer 10

• melasma

Question 11

what gender does melasma usually affect

Answer 11

• women

Question 12

melasma is associated with _______ changes

Answer 12

• hormonal

Question 13

melasma associated with what conditions

Answer 13

• pregnancy - birth control pills - hormone replacement

Question 14

melasma worse with exposure to

Answer 14

• UV radiation

Question 15

treatment for melasma

Answer 15

• daily sunscreen - hydroquinone 4% cream

Question 16

what is a brown to blue-grey deposition that appears on patients that may involve the bones or thyroid. patient often has rosacea and is treated for it

Answer 16

• minocycline pigmentation

Question 17

other causes of medication-related hyperpigmentation

Answer 17

• amiodarone - hydroxychloroquine

Question 18

what are eczematous eruptions occurring with venous insufficiency and leg edema

Answer 18

• stasis dermatitis

Question 19

extravasation in stasis dermatitis leads to _______ pigment and petechiae

Answer 19

• brown pigment

Question 20

treatment of stasis dermatitis

Answer 20

• elevation and compression stocking - medium potency topical steroids

Question 21

why do you avoid topical antibiotics with stasis dermatitis

Answer 21

• half develop allergic contact dermaitis

Question 22

antibiotics to avoid with stasis dermatitis

Answer 22

• neomycin - bacitracin

Question 23

what describes a common phenomenon of darkening/lightening of the skin at or around sites of injury or inflammation. individuals with olive or slightly darker complexion are at risk.

Answer 23

• post inflammatory hyper/hypopigmentation

Question 24

what are well-circumscribed depigmented macules and patches

Answer 24

• vitiligo

Question 25

test for vitiligo

Answer 25

• wood’s light

Question 26

what is an autoimmune attack on melanocytes that favors areas of trauma

Answer 26

• vitiligo

Question 27

vitiligo is associated with other _______ disorders

Answer 27

• autoimmune

Question 28

treatment of vitiligo

Answer 28

• potent topical steroids - tacrolimus ointment - phototherapy

Question 29

what is skin lightening that can result from potent topical or intralesional corticosteroids

Answer 29

• steroid hypopigmentation

Question 30

what condition presents with reticulate dyspigmentation with nail dystrophy and oral leukoplakia with malignancy risk

Answer 30

• dyskeratosis congenita

Question 31

most common gene implicated in dyskeratosis congenital and it’s role

Answer 31

• DKC1 - telomere maintenance

Question 32

hypopigmented patches on the face of atopic children are usually _______

Answer 32

• pityriasis alba