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206 Cards in this Set

  • Front
  • Back
macule
non-palpable area, change of color < 5mm
patch
nonpalpable area, change of color, >5mm

aka large macule
papule
elevated, lesions 5mm

lichen planus
nodule
elevated lesions 5mm - 5cm

compound nevus
tumor
elevated palpable lesion, up to 5cm

squamous cell carcinoma
plaque
papule larger in area than in thickness, >2 cm in diameter

psoriasis
vesicle, bulla
fluid -containing lesion, elevated
vesicle 1/2cm
bulla larger

vesicle: herpes simplex
bulla: bullous pemphigoid
pustule
elevated lesion containing pus

acne vulgaris
cyst
tumor containing liquid or semi-solid material

epidermal cyst
wheal
transitory palpable lesion due to edema in upper dermis
ex: hives
burrow
linear trail produced by parasites

example: scabies
scale
excessive accumulation of loosely adherent keratin

ex: psoriasis (thick scale)
pityriasis rosea (fine scale)
crust
accumulation of serum, cellular bacterial, squamous debris over damaged epidermis

ex: impetigo
fissure
crack in epidermis extending into papillary dermis

hand eczema
lichenification
areas of accentuated skin markings
thickening of epidermis
scratching or rubbing

neurodermatitis
erosion
loss of epidermis
heals without scarring

impetigo
ulcer
loss of epidermis and part/all of dermis
heals with scarring
excoriation
linear erosions
self-induction implied but cause unknown

scabies
scar
fibrous tissue replacing normal architecture of dermis
epidermal atrophy
thinning of epidermis; discoid lupus erythematous
dermal atrophy
decrease in collagen/mucosubstances causing depression of skin; atrophy following steroids
verrucous
wart-like

verruca vulgaris
pedunculated
on stalk
sessile
not on stalk
pigmentation
discoloration of skin; melanin, foreignsubstances, or hemorrhage
telangiectasia
dilatation of superficial vessel
eczematoid
inflammatory lesions with scale, vesiculation, crust, and weeping

ex: poison ivy dermatitis
circinate
circular lesions

herald patch of pityriasis rosea
annular
ringshaped lesion with active margin adn clear center

ringworm
discoid
disk-shaped

discoid lupus erythematous
nummular
coin-shaped

nummular eczema
gutate
drop-sized

guttate psoriasis
iris lesion
target lesion; two or three circles form true iris

erythema multiforme
herpetiform
grouped (vesicles, papules, excoriations)

herpes simplex
reticulated
net-like distribution

livedo reticularis
morbilliform
small confluent macules
irrgular shapes
confluent
blending into adjacent lesions
straight (linear)
excoriations
arcuate
arc-shaped
serpiginous
snaked shaped


hives
zosteriform
linear dermatome

herpes zoster (shingles)
koebner's isomorphic phenomenon
lesions forming in areas of previous trauma to skin

ex: psoriasis, lichen plnaus, warts
5 basic morphologic groups
papulosquamous
vesicular/bullous
vascular rxn
dermatitis-eczema
tumor nodule
atopic triad
asthma
allergic rhinitis
atopic eczema
keratosis pilaris
perifollicular hyperkeratoses seen pimarily over extensor surfaces of arms and thighs

seen with atopic dermatitis
dennie's lines or pleats
"extra" fold of lower eyelid

seen with atopic dermatitis
white dermographism
seen with atopic dermatitis
pathogenesis of atopic dermatitis (5)
1) IgE elevated; th2
2) increased il4, il5, il13 by cd4 th2 cells; decrease ifn-gamma by th1
3) increased camp catabolism... increased pge2, il10
4) superantigen stimulation of tcell activation
5) food hypersensitivity
mutation in atopic dermatitis and ichthyosis vulgaris
fillagrin
differential diagnosis of atopic dermatitis
seborrheic dermatitis
contact dermatitis
psoriasis
management of AD
avoid soaps/h20
topical steroids
antihistamines
moisturizers
UV
80% of hemangiomas are
single lesions
rapid growth phase of hemangiomas seen in the first _______
6-9 months of life
resolution of hemangiomas is the rule by _____
10-12 years of age
therapy for hemangioma
reassurance is adequate for most
- soaks, vaseline, topical antibiotics
- prednisone
- intralesional corticosteroids
- interferon a-2a/a-2b
- surgical excision
5 types of dermal malformation
capillary (portwine)
venous
lymphatic
artieral
combination
vascular malformations do/do not regress
DO NOT
kasabach-merritt syndrome
variously sized hemangiomas. platelet sequestration --> thrombocytopenia
sturge-weber syndrome
capillary malformation (port-wine) in distribution of V1 with ipsilateral meningeal and cortical vascular malformation.
seizures- 80%
hemiplegia 30%
mental retardation 60%
need to check for glaucoma
klippel-trenaunay-weber syndrome
ipsilateral hypertrophy of a limb or body part with capillary/venous malformations

bone and soft-tissue hypertorphy
PHACES syndrome
posterior fossa malformation
hemangiomas
arterial anomalies
coaractation of aorta
eye anomalies
sternal clefts

rare assocaiton of hemangioma with developmental anomalies
phaces sydnrome
associated with cerebrovascualr anomalies and endocrine dysfunction
fungi cell wall made of
chitin
fungi cell wall made of
ergosterol
azoles
inhibit ergosterol
allylamines
inhibit ergosterol
candins
attach to chitin
tinea capitis and onychomycosis must be treated _____
systemically
examples of deep fungal dz
blastomycosis
cryptococcosis
coccidiodomycosis
actinomycosis
histoplasmosis
host defense mechanisms
alpha-2 macroglobulin keratinase inhibitor
complement activation --> phagocytosis
antifungal antibody
cell mediated immunity (lymphocytes and lymphokines)
serum inhibitory factor: unsaturated transferrin
epidermal desquamation
3 clinical types of tinea capitis
grey patch
black dot
kerion
3 clinical types of tinea pedis
interdigital
dry scaly
vesicular
tinea capitis mostly pediatric or adult disroder
pediatric
tinea pedis mostly a pediatric or adult disorder
adult
common mimic of tinea cruris
corynebacterium erythrasma
does tinea cruris affect scrotal skin
no
what is majocchi's granuloma
deep invasion of fungi intinea corporis
what enhances infection in tinea corporis
topical steroids; suppresses natural inflammatory host response and scale
laboratory test for tinea versicolor
KOH preparation
seborrheic keratosis
superficial, stuck on skin lesion, verrucous surface, hyperpigmentation

no malignant potential
dermatosis papulosa nigra
multiple small seborrheic keratosis on face, particularly the malar area of darker skinned individuals
sign of lesar-trelat
rapid widespread onset of seborrheic keratosis.
can be associated with internal malignancy
rx of seborrheic keratosis
excision not necessary. often treated only when irritated.
laser, curettage, electrodessication, simple shave or liquid nitrogen
acrochordon
skin tag.
fleshy, exophytic, papillomatou skin lesion in mid age


neck, axilla, inguinal folds, under breasts, waist or bra-line
acrochordon is often associated with
seborrheic keratoses
therapy of acrochordon
none. benign
dermatofibroma
reddish-brown, firm papule on extremitis in middle-aged women.
dimple sign with compression
is dermatofibroma benign/malignant?
benign.
does not evolve into dermatofibroma sarcoma protuberans.
no therapy required
neurofibroma
small, firm, flesh-colored papules. solitary or multiple.
multiple lesions associated with internal neurofibromas and cafe-au-lait spots
von recklinghausen's dz
mutliple neurofibroma skin lesions assoc. w/ internal neurofibromas and cafe-au-laid spots
lipoma
soft, rounded, moveable, nontender, subcatneous tumor.
single or multiple.
looks like a cyst, without central puncta.
growth rate for lipoma
slow.
may grow to large size and infiltrate deeply.
lipomas incidence higher in ____
obese, diabetes, high cholesterol.
if you see lipoma, need to consider
liposarcoma.
most susceptible areas to keloid formation
sternum, neck, ears, back, and legs
rx for keloids
corticosteroid injections
silicone occlusion
laser
cryotherapy
compression
alpha-interferon
excision
irradiation
cherry hemangioma
dilated capillaries and postcapillary venules.
presents as well-demarcated, small red papule on older adult skin.
sebaecous cyst, epidermal inclusion cyst


causes
dermal nodule or tumor with central puncta/opening that expresses cheesy material


causes: acne

men> woman
multiple sebaecous cysts, think of ____
gardner's syndrome
pilar cyst
usually in scalp, occasionally on face.
benign.
clinically indistinguishable from epidermal cyst.
milium
small < 3, white/yellow papule.
de novo, burns, trauma, occlusion,
no rx required
ephelides
freckles
lentigines
solar lentigo: age or liver spots


childhood lentigo may be associated with systemic defects
melanocytic nevus
melanocytic lesion.
congenital nevi: shortly after birth up to age 2
acquired nevocellular nevus
acquired in 3rd decade
halo nevus
hypopigmented area around a junctional nevus;
associated with vitiligo and malignant melanoma.
no therapy rquired, but histo exam necessary if suspect MM.
dysplastic nevus syndrome
unusual looking mole.
multiple. paitnet develops melanomas.
non-syndrome associated dysplastic nevi
fewer lesions, solitary. not associated with melanomas.
basal cell carinoma is a tumor of ______
keratinocytes
biggest predisposing factor for BCC
sunlight exposure.

others: radiotherapy, arsenic ingestion, congenital disorders xeroderma pigmentosum, basal cell nevus syndrome.
BCC: metasis rare or common
rare
BCC: invasive or noninvasive
invasive, but slow growing.
RX for BCC
removal: > 90% cure.

imiquimod (aldara): topical cream: immune modular that treats actinic keratoses and superficial BCC.
actinic keratosis is a ______-
precancerous lesion of keratinocyte
what does actinic keratosis feel like
rough/sandpaper feel
actinic keratosis potentially could turn into ____
squamous cell carcinoma
actinic keratosis is localized to ___-
sunexposed areas
bowen's disease is very common in ____
patients exposed to arsenic
bowen's dz has increased ____
incidence of internal malignancy.
squamous cell carcinoma is a tumor of ___
keratinocytes
SCC could metastasize to
local lymph nodes, liver, lung, bone, brain.
could spread perineurally
keratoacanthoma is a ____
well-differentiated SCC.
tumor with central crater or keratinous plug.
Keratoacanthoma is benign/malignant
benign. rarely malignant.

spontaneous regression possible.
dermatofibroma sarcoma protuberans
tumor of fibroblasts. red-brown, infiltrative nodules.
lentigo maligna
hutchinson's freckle.
older individuals (65+)
melanoma in situ.
removal indicated.
lentigo maligna melanoma
like hutchinson's freckle, but more invasive
superficial spreading melanoms (SSM)
70% of melanomas.
flat, but can have nodules.
found on trunk of men and posterior thigh of women
nodular melanoma
second most common type of melanoma
acral-lentiginous
melanoma on an acral surface.
late diagnosis.
in people of dark skin.
most important indicator of invasion
breslow's thickness
clark's level
level of invasion.
what does retinoin do?
reverses altered keratinization and diminishes sebum production
side effects of retinoic acid
teratogenicity,
xerosis
cheilitis
hypertriglycemidia
rosacea onset typically after ____
age 30
4 clinical features
central facial erythema and telangiectasis
papules/pustules; no comedomes
eye involvmeent: blephartiis, conjuctivitis, keratitits
rhinophyma
what is seborrheic dermatitis
chronic, superficial, inflammatory process affecting hair regions of the body: esp. scalp, eyebrows, face
seborrheic dermatitis might be allergic reactiont to
pityrosporum
clinical lesions of seborrheic dermatitis
patches/plaques with indistinct margins,
mild-to-moderate erythema
yellowish, greasy scaling
rx for seborrheic dermatitis
medicated shampoos
topical corticosteroids lotions/solutions
topical antimicrobial agents
impetigo
golden-crusted erosions
superficial bullae
vesicles with turbid fluid
expansion of impetigo
annular pattern
body parts where impetigo found ____
face, hands, genitalia, scalp
impetigo does/does not have constituional symptoms
does not
what is ecthyma
deep impetigo often on legs; heals with scars
streptococcus impetigo
usually nonbullous
staphyloccocus impetigo
commonly bullae and pustules
complication of impetigo
postreptococcal glomerulonephritis
rx of impetigo
gentle removal of crusts, washing of lesions, topical antibiotics (muciprocin)
systemic antibiotics
folliculitis is
infeciton of hair folilcles
bockhart's impetigo
superficial folliculitis.
dome-shaped, yellow pustules on a red base with hair shaft in th emiddle.
superficial folliculitis is more commonly seen in children/adults
children.
causative agent of superficial folliculitis
staph. aureus
gram-negative folliculitis mainly occurs ____
as superinfection in acne patients receiving long-term systemic antibiotic therapy.
causative agents of gram-negative folliculitis
klebsiella
enterobacter
proteus
rx for gram-neg folliculitis
oral antibiotics
retinoids
pseudomonas aeruginosa folliculitis
6 hours - 5 days after use of hot tub/jacuzzi.
often, no rx necessary
folliculitis barbae (sycosis barbae0
deep-seated folliculitis of the bearded area.
staphylococcal origin.
rx: antibiotics
furuncles
painful, circumscribed, perifollicular, staph abscess with tendency to central necrosis and suppuration
nodules of furuncles
deep, red, tender
rx of furuncles
warm, moist compress
if severe: incision/draining, systemic antibiotics
carbuncles
large dep -seated, staphyloccocal abscess, made of aggregates of interconnected furuncles that drain at multiple points on the skin.
carbuncles usually seen in men or women?
men
where on body is carbuncles seen?
back of neck, shoulders, buttocks, hip joint/thighs
carbuncles do or do not have constitutional symptoms
do
carbuncles may or may not present with pain
may
cellulitis
acute suppurative inflammation of deeper subcutaneous tissues of the skin.
causative agents of cellulitis
group A beta-hemolytic streptococci
or
Staphyloccocus aureus
rx of cellulitis
systemic antibiotics
erysipelas
superificla form of cellulitis with well-demarcated border
erysipelas causative agent
group A streptococcus
most common location of erysipelas
face
what is erythrasma
superificail bacterial infection of skin caused by corynebacterium minitussimum
causative agent of erythrasma
corynebacterium minitussimum
where does erythrasma present?
groin/axillae, maybe toe webs
erythrasma frequently seen in______
obese, diabetic, debilitated patients
wood's lamp examination?
coral red fluoresence of erythrasma
rx of erythrasma?
topical/oral antibiotics (erythromycin)
herpetic whitlow
vesicles on erythematous base

herpes simplex
gingivostomatitis
herpes simples; vesicle, regional adenopathy, subsequent erosions
eczema herpeticum
generalized herpes on entire body in atopic eczema
genital vulvovaginitis
veneral transmission;
vesicle on erythematous base;
fever, malaise, lymphadenopathy
aphthous stomatitis
discrete yellowish ulceration with surrounding erythema on buccal mucosa


herpes simplex
tzanck smear
herpes simplex lab test
chicken pox incubation period
2- 3 weeks
pityriasis rosea does/does not spare palms and soles
does.

this is one way to differentiate from syphilis, which involves palms/soles
psoriasis mostly exists on extensor or flexural surface?
extensor
is dysplastic nevus benign or malignant?
benign
fungi have what kind of growth?
dimorphic
what are clinical symptoms of tinea capitis?
alopea + pruritus
bright red skin lesions with satellite pustules...dx?
candidiasis
erysipelas does/does not have well demarcated border
does
common cause of erysipelas?
strep pyogenes
how would you diagnose erythrasma in a patient?
wood's lamp...see coral red fluorescence
treatment for erythrasma?
erythromycin
what is this?
ordinary sessile papules with rough gray surface, occurs on fingers
verruca vulgaris (common warts)
what is this? flesh colored, pedunculated or polyploid nodules, occurs on mucocutaneous membranes or interginous areas.
condylomata acuminata
what is this?
dome shaped papules with central umbilication. contagious and self-inoculable
molluscum contagiosum
what is this?
gross: dry thickened plaques on flexural surfaces with scales.
micro: acanthosis, orthokeratosis
chronic eczema
what type of allergic reaction is eczema
IgE mediated, th2 dominated.
what is the most dangerous pediatric vascular malformation?
atriovenous malformation
what type of allergic reactions is urticaria
type I histamine mediated
what type of allergic reaction is allergic contact dermatitis
type 4 t cell mediated
what common drugs cause morbilliform drug reaction rash?
antibiotics (penicillins, sulfas)
antihypertensives
nsaids
anticonvulsants
what is propionibacterium?
a bacteria that can cause acne vulgaris
in rosacea, what treatment must you avoid?
systemic steroids
what is pityrosporum malassezia?
it's a yeast that can cause seborrheic dermatitis