Dark and Light Rashes Flashcards
hyperpigmented scaly macules on the upper chest and back can be significant for. less common on the face
- tinea versicolor
what test do you do to rule in tinea versicolor
- KOH exam
what do you see on a KOH exam with tinea versicolor
- pseudohyphae - round spores of malassezia
what happens with tinea versicolor when you start rubbing off for KOH exam. what do you see?
- scale
tinea versicolor in light skin types is hyper/hypopigmented
- hyperpigmented
tinea versicolor in dark skin types is hyper/hypopigmented
- hypopigmented
treatment of tinea versicolor
- anti-dandruff or Ketoconazole shampoo - later and hold for 10-15 minutes
treatment of tinea versicolor for limited disease
- azoles creams for 2 weeks
treatment of tinea versicolor for widespread diseaes
- one time dose of oral fluconazole
what is characterized by patchy light to dark brown pigmentation of the face
- melasma
what gender does melasma usually affect
- women
melasma is associated with _______ changes
- hormonal
melasma associated with what conditions
- pregnancy - birth control pills - hormone replacement
melasma worse with exposure to
- UV radiation
treatment for melasma
- daily sunscreen - hydroquinone 4% cream
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
- minocycline pigmentation
other causes of medication-related hyperpigmentation
- amiodarone - hydroxychloroquine
what are eczematous eruptions occurring with venous insufficiency and leg edema
- stasis dermatitis
extravasation in stasis dermatitis leads to _______ pigment and petechiae
- brown pigment
treatment of stasis dermatitis
- elevation and compression stocking - medium potency topical steroids
why do you avoid topical antibiotics with stasis dermatitis
- half develop allergic contact dermaitis
antibiotics to avoid with stasis dermatitis
- neomycin - bacitracin
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.
- post inflammatory hyper/hypopigmentation
what are well-circumscribed depigmented macules and patches
- vitiligo
test for vitiligo
- wood’s light
what is an autoimmune attack on melanocytes that favors areas of trauma
- vitiligo
vitiligo is associated with other _______ disorders
- autoimmune
treatment of vitiligo
- potent topical steroids - tacrolimus ointment - phototherapy
what is skin lightening that can result from potent topical or intralesional corticosteroids
- steroid hypopigmentation
what condition presents with reticulate dyspigmentation with nail dystrophy and oral leukoplakia with malignancy risk
- dyskeratosis congenita
most common gene implicated in dyskeratosis congenital and it’s role
- DKC1 - telomere maintenance
hypopigmented patches on the face of atopic children are usually _______
- pityriasis alba
