Dermatology II Highlights Flashcards
Most common benign epithelial tumor is what?
Seborrheic keratosis
True or false: acanthosis nigricans is difficult to completely eradicate
True
True or false: Cryo is not effective for hemangiomas/ cherry angiomas
True
True or false: Actinic keratosis is precancerous to SCC
this is on exam
True
What is the m/c precursor lesion of Squamous cell carcinoma
Actinic keratosis
What condition is characterized by rough (coarse like sandpaper) scaly lesions on sun-exposed skin?
Actinic keratosis
What are 2 key aspects of pediculosis (lice) Tx?
Topical ivermectin and special comb
Intense, “Itching so bad I can’t sleep” with burrows, excoriations, or serpiginous ridges are classic Sx of what?
Scabies (sarcoptes scabiei)
Scabies (sarcoptes scabiei) usually spares what in adults?
Head & neck
Latrodectism: Latrodectus (widow spiders): what is the classic presentation?
Initially asymptomatic or mild pain, then muscle pain
1) What should you consider for black widow bites?
2) What else should you do?
1) Antivenom
2) Monitor vitals and breathing closely
How do you treat recluse bites?
Wound care, analgesics, tetanus prophylaxis, surgical debridement, consider admission (severe cases)
Red, white, blue lesions are Sx of what?
Recluse spider bites
What has a ~10% of necrosis?
Recluse spide bites
True or false: systemic Sx involving brown recluse bites are rare
True
What is one Tx for a brown recluse spider bite?
Surgical debridement
Is alopecia areata scarring or non-scarring?
Non-scarring
What typically presents w. “exclamation point hairs”?
Alopecia areata
Subungual debris is a Sx of what?
Onychomycosis (Tinea Unguium)
What are the 4 potential locations of tinea?
Capitis, corporis, unguium, pedis
Onychomycosis (Tinea Unguium):
1) Tx in fingernails?
2) Tx in toenails?
1) PO griseofulvin 500mg 1 PO BID w/high fat meal x 4mo,
2) 1st line griseofulvin, 2nd line PO terbinafine x 12wks
-must monitor ANC and d/c if ANC< 1000
True or false: you must confirm a Onychomycosis (Tinea Unguium) Dx with a lab test before Tx
True
How must you confirm an onychomycosis (Tinea Unguium) dx?
Hepatic function test & CBC q4-6 weeks for PO antifungals
What does a very flocculant, painful, warm paronychia need?
L&D
Dermatophytosis: list all the types of tinea
1) Tinea pedis: foot
2) Tinea manum: hand
3) Tinea cruris: crural fold, groin “jock itch”
4) Tinea corporis, aka “ringworm”: body, extremities
5) Tinea facialis: facial
6) Tinea capitis: scalp hair
7) Tinea barbae: beard hair
1) What is found with a moist environment on the skin?
2) What needs to be monitored when treating this condition?
1) Dermatophytosis/ tinea
2) LFTs and CBC/ANC
What will you see when you scrape tinea versicolor?
Yeast & elongated hyphae (think “spaghetti and meatballs”)
How may tinea versicolor under a woods lamp? What does this distinguish it from?
Fluoresce blue/green; vitiligo remains white without scale
What are Malassezia?
Microscopic spores and hyphae
Poxvirus is also called?
Molluscum contagiosum
1) Dome-shaped umbilicated papules describe what?
2) What is the best Tx?
1) Molluscum contagiosum
2) Curettage or liquid nitrogen (cryotherapy)
Burning, stinging, grouped vesicles on erythematous base (“dew drops on a rose petal”) describe what?
Herpes simplex (HSV)
When is suppressive antiviral therapy used for HSV?
Frequent or severe recurrences
True or false: VZV vaccination exists
True
Varicella zoster virus (VZV):
1) What can it occur as in adults?
2) How?
1) Shingles
2) VZV dormant in cranial nerve sensory ganglia & spinal dorsal root ganglia after primary infection
What lesions resemble chickenpox but follow unilateral dermatomal pattern?
Shingles varicella zoster virus (VZV)
1) What condition has a unilateral dermatomal pattern?
Bonus q: Tx?
1) Varicella zoster virus (VZV) Shingles
Valacyclovir or famciclovir within 72 hrs (uncomplicated), tapering course steroids; IV acyclovir for extradermatomal complications
Pain usually precedes rash in what condition?
Varicella zoster virus (VZV) shingles
Macerated, mirror image regions in intrigenous areas with satellite lesions are characteristic of what?
Cutaneous candidiasis
There is _____________ for anogenital HPV types to prevent infection & reduce cancer
vaccination
What is the mainstay of ocular verrucae (warts/ HPV) Tx?
Oculoplastic surgery
Warts are also called what?
HPV/ verrucae
