Tinea versicolor is caused by this organism
pityriasis rosea treatment
deeply seated mass in the trunk that is associated w/ vague abdominal discomfort; previously had similar things in the area that were surically excised
desmoid tumor - locally aggressive benign arising from fibroplastic elements within the muscle or fascial planes
low potential for mets or differentiation
can cause intestinal obstruction and bowel ischemia
high rate of recurrence, even after surgery
What is the Leser-Trelat Sign?
What is it associated with?
acute onset of numerous seborrheic keratoses
associated w/ many internal malignancies, most commonly adenocarcinoma of the GI tract
what is characteristic of chronic urticaria's presentation?
episodes of well-circumscribed and raised erythematous plaques w/ central pallor - lesions appear and enlarge over minutes to hours before disappearing within 24 hours
resolves spontaneously within 2-5 yeras
treatment for infantile hemangiomas
tinea capitis treatment
PO griseofulvin or PO terbinafine
caused by Trichophyton tonsurans or microsporum species
topical antifungals are ineffective of the infection in patients w/ involvement of the hair folliciles, but some people recommend it to reduce transmission to household contacts during treatment.
treatment of actinic keratosis
treat early w/ destructive or pharmacologic measures to prevent degeneration into invasive SCC
treatment of psoriasis (plaques only)?
treatment of psoriasis (w/ joint involvement)?
plaque psoriasis = TOPICAL high-potency steroids or Vit D derivatives (i.e. calcipotriene)
topical steroids may trigger pustular psoriasis
psoriatic arthritis = methotrexate. phototherapy
when is the vaccine indicated?
treatment of post-herpectic neuralgia
acycolvir or valacycolvir started within 72 hours of onset of rash
(steroids have not been proven beneficial, but have actually been associated with secondary bacterial infections)
vaccines recommended for adults ≥60, shown to reduce risk of zoster and post-herpetic neuralgia
PHN: TCA, topical capsaicin, gabapentin, long-acting oxycodone
scabies rash is due to what type of hypersensitivity reaction?
delayed type IV reaction to the mite, its feces and ova
5% permethrin cream
PO ivermectin if it is an outbreak in a nursing home or a facility where it may be difficult to use topical therapy
"tomato-red plaques and satellite papules" are characteristic of ...
candidal intertrigo and perineal infection
treatment for photoaging
all-trans-retinoic acid (ATRA) aka tretinoin
painLESS blisters, fragile skin, facial hair overgrowth and pigmentation triggered by ingestion of substances (e.g. ethanol, estrogens)
what is it often associated wtih?
how to cinch the diagnosis?
porphyria cutanea tarda - ∆uroporphyrinogen decarboxylase (enzyme in heme synthesis)
often associated w/ HepC
urine test for urinary uroporphyrins
tx: phlebotomy, hydroxychloroquine, IFNa (for those who are also infected w/ HepC)
Alopecia areata is commonly associated with what other physical finding
what other autoimmune conditions are they at increased risk for?
thyroid disease, vitiligo, pernicious anemia
DIfference between telogen and anagen effluvium
both have diffuse thinning of hair, but anagen effluvium affects the growing phase of the hair growth cycle (hair formation) and telogen effluvium affects hte resting stage of the hair cycle
Treatment regimen for patients w/ hidradenitis suppurativa (HS)
weight loss, smoking cessation, daily skin cleansing
if + nodules, sinus tracts, scarring -> PO tetracyclines
if +diffuse involvement/extensive sinus tract -> infliximab, PO retinoids, surgical excision
erythema + telangiectasias - topical brimonidine (peripheral a2 agonist->vasoconstriction of blood vessels)
(clonidine is also a central a2 agonist -> decreases sympathetic tone)
complication most frequently associated w/ rosacea
ocular manifestations (burning, foreign body sensation, blepharitis, keratitis, conjunctiviitis, corneal ulcers, recurrent chalazion)
venous sinus thrombosis is a complication of which type of infection?
when is PO antibiotics indicated for acne?
for patients w/ severe or nodular (cystic) acne
moderate acne that is unresponsive to topical antibiotics
widespread acne (back, arms)
what is melasma
acquired hypER-pigmentation on sun-exposed areas of the face
more common in women, esp during pregnancy
patient on acne treatment develops sunburn, which medications is he on?
of the acne medications, which has the lowest risk of photosensitivity?
oral tetracycline, doxycycline, benzoyl peroxide
minocycline - lower risk of photosensitivity
what medication has been shown to reduce pain and erythema,a and minimize damage to the epidermis if administered immediately after sun exposure?
8 main ADRs of isotretinoin
- hypertriglyceridemia (avoid etoh due to risk of pancreatitis)
- mucocutaneous reaction
- blood dyscrasias
- ocular toxicity
- severe depression, suicidal ideation
this whitish, lacy streak on a background of erythema on the buccal mucosa is a common finding in which disorder?
what is it commonly associated with?
lichen planus (5P's)
planar papules and plaques
mucosal involvement = Wickham striae (reticular white lines)
commonly associated w/ HepC
patient presents w/ new onset of severe seborrheic dermatitis. what should you consider?
treatment of potentially disfiguring or complicatied infantile hemangiomas (those that involve viscera, airways, necks, periorbital areas)
prodrome of urticaria followed by an erythematous rash w/ tense bullae
diagnosis? confirmatory test?
test: skin biopsy, serum assay for basement membrane antibodies
explosive onset of pruritic seborrheic keratosis - consider this:
patient on BP medication develops sun burn, what medication is likely to have caused it?
patient on BP medication develops SJS, what medication is likely to have caused it?
patient on BP medication develops angioedema, what medication is likely to have caused it?