DERM Flashcards
Irritant vs Allergic Contact dermatitis
Irritant = diaper damage to kerotincytes and agent ; Vessicles FAST
Allergic = delayed hypersensitivity Type 4 [metals; nickel // fragrances ] ; slower
Mild severe CD management
Mild = topical high potency
PO predinisone = SEVERE
Eczema most common treatment for flares
High potency steroid
Eczema patho
Chronic skin barrier dysfunction
IgE mediated hypersensitive reaction
The ITCH that RASHES
Cyclic ; spares diaper ; extensor surface = kids ;; flexor surface kids
Pityriasis Rosea
Recent URI
Rash is sudden ; pruritic!@ “Christmas Tree Pattern”
1 Herald patch rash
HHV 6 // 7
PR treatment
Supportive self limited 6-8 weeks
Psoriasis nail findings
Nail pitting
Onycholysis
Psoriasis patho
T cell mediated ‘’keratin hyperproliferation”
+Koebner phenomenon
+Auspitz sign = scratch and bleed
What vitamin can be helpful in psoriasis
Vit D
Mild to moderate psoriases is how much of the body surface
10-30%
Organism of tinea vesicolor
M. Furfur
Woods lamp findings for tinea versicolor
Yellow green
Copper orange
Fluorescence
1st line tinea vesicolor
Azole anti fungals creams
Topical selenium sulfide
Topical zinc pyrithione
Superficial =
Epidermis only + blanching
Second degree burn
Deep partial thinkness in the dermis = not into the fat
[ sluggish blanching // pain is only to pressure]
Superficial partial thinkness
Partial thickness = + blanching
+ blisters
3rd degree burns =
= full thinking into the fat
Central white clearing
4th degree burn =
Full thickness into the muscle
“Painless”
Deep partial burn to 4th degree re fluid number
4 mL x TTBSA of burn (%) x body wt (kg)
First half over first 8 hours
Rest over 24 hours
Best topical antibiotics for burn conditions
Silver sulfadizine
Triple antibiotic ointment
TETANUS
Stage 1 vs stage 2 pressure ulcer
1 = in tact non blanching erythema ; intact skin
+/- pain
2= shallow open ulcer
Red pink wound bed
Stage 3 pressure ulcer
Into the fat slough + Eschar
Stage 4 pressure ulcer is concerning for what
Undermining tunneling // bugs —> osteomyelitis
Mc types of lesion in Steven Johnson sydnrome and what type of medication
Sulfa based
Mucosal lesions
MC cause of Erythema Multiforme
HSV
EM can effects what part of the body
Legs arms —> palms ,, soles
SJS and TEN
SJS = less than 10%
TEN = 30%
Epileptics and Bactrim
SJS TEN has lesions that are like what
Proximal > Distal ;; think in the faceeee and trunkkkkkk
Bx of SJS and TEN will show what
Epidermal necrosis
Bullous pemphigoid think what?
NEGATIVE NIKOLSKY no slough
IgG autoantiboides
Attack hemidesmosomes
PRURITIC
+FLEXURAL AREAS
Bullous pemigoig Dx
Dx
Histopathology ; linear deposition
Pemphigoius vulgaris patho
Connection between skin cells messed up!
Fucked up the desmosomes
Vesicular blistering
IgG deposition
ACANTHOLYSIS
+NIKOLSKY SIGN
[myathesenia gravis// thymoma] - assoc
1st line pemphigous vulgaris
IV CC
What part of the skin/hair is affected in acne vulgaris
P. Acne’s at the pilosebacuos follicle
Describe moderate acne
Comedomal with; inflammatory lesions
= no cysts no scars
Evolution of treatment in acne
Topical retinoid
BP
PO ABX
Isotretinoin
Rosacea colonization of what ?
Demodex mites
What 3 ocular sxs in rosacea
Eye pruritis
Dry eyes
Gritty watery eyes
Best topical vs. oral treatment for rosacea
Topical = metronidazole
Oral = Doxy
What is the melanoma prognostic
Breslows Thickness
Mc type of melanoma
Superficial spreading
Eye involvement with pupil changing size think what pathology
Melanoma
Precursor to squamous cell carcinoma
AK !
1 reason for squamous cell carcinoma in the skin
SUN
What does SCC look like
Pimple like on sun exposed area
+/ - bleeding
Non healing
Asxs
Describe AK
Solar keratosis
Atypical keratin cells
Thickness scaly crusted !
Hypopigmentation
SCCs management
5 ASA
Imiquimod
Standard excision
Radiation
BCC on the nose how do you treat it
MOhs Surgery !!
BCC looks like
MC type
Pearly nodule
Telenagiectasias
Mc type : NOdule ulcerated
Paronychia
Lateral proximal nail folds swelling infection on ONE finger
Wraps around the nail
Strep pyogenes
Staph A
Herpetic whitlow
Probably have HSV somewhere else , might be white
Felon is usually where on the nail
Palmar surface
Oral ABX for finger [ felon paraynchia ]
Dicloxacillin
Cephalexin
Cellulitis onset of sxs
Slow onset of chilled fever malaise
Tender erythematous gredaully increase in size
UNILATERAL
Upside down bottle leg
Lipedermatosclerosis
Fat limiting distal
Cellulitis complication
MRSA cellulitis
Vancomycin
Doxy
Clinda
Bactrim
Erysipeals mc infective agent
Strep pyogenes
Borders of erysipeals
WELL DEMARCATED epidermis
Super red
Oral ABX for erispeals
PCN
Amoxicillin
Cephalexin
IV = Ceftriaxone // Cefazolin
Derantophyte infection how do we diagnose
10% KOH
Tinea cap it’s has what characteristic sign
Black dot hyperkaratotic plaque
Tinea corporis
= TING WORM
Scaling annular lesion
Multiple stages of development
Tinea Pedis
Macerated wet moist interdigital show
KEEP IT DRY