Derm Flashcards
Flat spot less than 1 cm in diameter?
macule
Flat spot >1cm in diameter, not-palpable?
Patch
Solid, elevated lesion
Papule
Papule that is > 1 cm and flat topped?
Plaque
Papable, solid lesion >1cm and not flat topped (i.e. lipoma)?
Nodule
Elevated, circumscribed lesion
vesicle
Elevated, circumscribed lesion >5mm containing clear fluid (Large blister)?
Bulla
Treatment for non-purulent cellulitis?
- Oral dicloxcillin, cephalexin or clindamycin
- IV cefazolin, nafcillin, clindamycin
Treatment for purulent cellulitis?
- Cover for MRSA
- Oral Bactrim, clindamycin, docycycline, linezolid
- IV vanco
Tx for a skin abscess?
- I&D
- Oral Bactrim, clindamycin, docycycline, linezolid
- IV vanco
Most common site for hidradenitis suppurativa? Tx?
- axilla
- mild: topical clindamycin and punch debridement
- severe: oral doxycycline or minocycline and more invasive surgical debridement
Tx for necrotizing fasciitis?
- immediate aggressive surgical debridement
- ABX: carbepenem or zosyn, PLUS clindamycin PLUS vancomycin
Tx of mild impetigo?? Moderate?
- Mild: topical mupirocin
- Moderate: oral doxycycline or cephalexin
SE of Isotretinoin?
- hepatotoxicity
- Teratogen
- dry skin/mucous membranes
- depression/SI
- increase triglycerides
Treatment for rosacea?
- Topical metronizale or azelaic acid
- Oral meds for acne: doxycycline, isotretinoin, ec
- Laser therapy
Flesh colored lesions with central umbilicaiton?
Molluscum contagiosum (poxvirus)
Cause of tinea versicolor? Tx?
- Malassezia furfur
- Tx: ketoconazole 2% shampoo
- Topical anti fungal (terbinafine)
KOH Spaghetti and meatballs?
Tinea versicolor
Tx of tinea capitis?
Oral griseofulvin
Tx of tinea unguium (nails)?
Oral terbinafine x 6 weeks
Tx of scabies?
Permethrin cream (treat the whole family and make sure to wash everything in hot water)
What is the difference in SJS and TEN?
-SJS: 30% BSA skin sloughing, full thickness epidermal necrosis, decrease H/H, inc AST/ALT
Erythematous plaques with greasy-looking, yellowish scales often near the hairline on the forehead?
-seborrheic dermatitis
Erythematous plaques with silvery scales on extensor surfaces?
Psoriasis
Herald patch (one pink lesion on chest or back) then 2 weeks later smaller lesions on the trunk/extremities (in christmas tree pattern)? Tx?
Pityriasis rosea
-Normally self limiting
Causes of erythema nodosum?
SPUD BITS
- Streptococcal
- pregnancy
- Unknown (idiopathic)
- Drugs
- Bechet
- IBD
- TB
- Sarcoidosis
Pruritic, purple, polygonal papule and plaques on the flexor surfaces. Can also have a white, lace-like pattern on the surface of the papule/plaques and mucous membrane involvement
Lichen planus
What infections can be associated with an increase likelihood of lichen planus??
HIV and hepatitis C
How can you confirm venous stasis?
-“venous reflux” finding on duplex US
What is Auspits sign? When do you see this?
-Bleeding easily with scraping the plaques of psoriasis
Anti-desmosome?
pemphigus vulgaris
Anti-hemidesmosome?
bullous pemphigoid
Treatment for pemphigus vulgaris?
-high dose systemic steroids
Treatment for bullous pemphigoid?
-topical steroids (clobetasol)
Margins for melanoma in situ?
0.5cm
Margin for melanoma
1.0 cm
Margin for melanoma >2mm thick?
2 cm +/- lymph node dissection
Best treatment for alopecia areata?
intralesional steroid injection
