Module 2 Flashcards
Alopecia
baldness, considered autoimmune disease, may be genetic with environment trigger
Can occur anywhere where hair is present
alopecia areata
hair loss occuring in patches
androgenetic alopecia (AGA)
or male-pattern baldness
most common cause of permanent hair loss
inherited from both parents
four cycles of scalp hair growth
anagen- growth phase
latent or involution- catagen
resting- telogen
hair shed- exogen
meds that cause hair loss
hormones
anticonvulsants
anticoagulants
oral contraceptive
beta blocker
antithyroid
excessive vitamin A
trichotillomania
hair pulling
more common in teens/kids
usually same side as dominant hand
alopecia treatment (greater than 50%)
oral corticosteroids, topical immunotherapy and immunomodulators
finasteride
tx alopecia
approved for men only
use with caution in liver dx
SE: decreased libido, ED
minoxidil
Topical, available OTC
aka rogaine
Best works for patients with recent onset of alopecia (less than 5 years)
SE: irritation, itching, dryness
the larger the melanosome
darker the skin color
Vitiligo
, or the total loss of skin color in patchy areas of the body (rarely over the entire body), is recognized clinically as white macules or patches that are usually located on sun-exposed areas, such as the face, lips, arm, hands, and feet.
most often in mid 20s
thought to be autoimmune
tx vitiligo
topical corticosteroids, light therapy, psoralen with UVA therapy
chloasma
“the mask of pregnancy”
caused by increased levels of estrogen, progesterone, melanocyte stimulating hormone
affect face, nipples, genitals, linea nigra
worsened by sunlight
tx chloasma
retinoic acid, hydroquinone cream, tretinoin, corticosteroid
melasma
more general term for hyperpigmentation of certain areas of skin regardless of pregnancy status
tx with hydroquinone and sun avoidance
Addison’s disease
can cause diffuse generalized hyper-pigmentation, especially in skin crease
other symptoms: weakness, fatigue, weight loss, amenorrhea, n/v, diarrhea
very dark color on one nail is suscpicious for
melanoma
pruritus causes
insects, contact dermatitis, medications, detergents, alternative meds/ herbs, recreational drugs
xerosis
dry skin
pruritus management
eliminate strong soaps, shorter showers, use effective emoillents
use of mild soap- dove, basis, purpose, cetaphil, neutrogena
apply emollient immediately after shower
rx- h1 histamine- hydroxyzine or benadryl (watch for drowsiness)
exanthem
rash
red/pink colored skin eruption
Paget’s disease
rash that looks like eczema dermatitis of nipple/areola
onset is gradual
typically on one nipple
toxic shock syndrome
risk factors- tampon use, greater than 30 hours
may have fever, vomiting, weakness, confusion
also may have bright red, fine maculopapular rash
remove tampon immediately!
urticaria
hives/wheals
a sudden generalized eruption of pale, evanescent wheals or papules associated with severe itching
Cholinergic urticaria
trigger- exercise, anxiety, elevated body temp, hot bath
lesions resolve within 30 mins
hives small, on trunk and arms
pruritic urticarial paules and plaques of pregnancy
PUPPP
papules and plaques that start on abdomen and spread to thighs, buttocks
normally during last 2 weeks of pregnancy
resolves after delivery
tx: corticosteroid
Scabies
is a highly contagious mite infestation that occurs mainly in children, young adults, health-care workers, and institutionalized persons of all ages. It is characterized by generalized intractable pruritus, often with minimal cutaneous manifestations
mode of transmission for scabies
close personal contact
crusted scabies
characterized by scaly lesions at the sites of invasion that soon become warty and encrusted, creating a protective barrier for these mites
more common in immune compromised
scabies clinical presentation
intense itching, worse at night- does not respond to treatment
changes in feeding pattern with kids
1-2 mm red papules in interdigital web space, wrist, axillary, pelvis, ankles, penis
burrows- white color with black specks
scabies diagnosis
burrow ink test
drop mineral oil over burrow, scrape off burrow with scalpel and ID
scabies tx
clean environment, close contacts
Kill all live mites- scabicides (permethrin)- first line tx
Some may require corticosteroids if severe
scabies follow up
1 week after treatment
Pediculosis
Infestation by lice
3 species- crab louse, head louse, body louse
Common in school aged kids
Pediculosis clinical presentation
Itching, more severe at night
Feeding pattern change
2-3 mm red erythematous macules or papules, often pruritic
excoriations often present
fresh nits closest to scalp
Diagnosis of pediculosis
itching and finding white nits or lice on hair shaft
pediculosis tx
Kill/remove lice and their nits- shampoo, cream rinse, lotion
manual delousing
pediculosis follow up
if uncomplicated, not needed
if needed, f/u in one week if symptoms persist
Candida is part of the normal flora of both the
oropharynx and gastrointestinal (GI) tract
two most important factors contributing to candidal infections
Favorable environmental factors and a weakened immune system are the
In women with AIDS, one of the earliest and most frequent opportunistic infection is
vaginal candidiasis.
thrush clinical presentation
severe sore throat, pain with swallowing
white creamy patches on ant/post pharynx and tongue
vaginal candidiasis clinical presentation
burning, itching, irritation of vulva/vagina
white cottage cheese discharge
balanitis clinical presentation
red rash and itching on penis
may have female sex partner being tx for yeast infection
intertriginous candidiasis
obese patient with red itchy rash, sometimes is weepy and moist
typically occurs where there is skin rubbing against skin
candidal paronychia
painful fingertip that is red hot and swollen
frequent water immersion of the hands common
subungual candida
no pain or itching
several discolored yellow fingernails for weeks/months
excessive contact from water immersion
topical antifungals
nystatin, clotrimazole, miconazole, naftifine, terbinafine, ciclopirox
applied twice daily x2-4 weeks
apply cream sparingly, may cause maceration
first line treatment for mild oral candidiasis
clotrimazole troches 10mg five times daily
or nystatin
candida infection follow up
2 weeks
dermatophytoses
aka tinea
superficial skin infections
tinea capitus
ringworm of scalp
tinea corporis
ringworm of the body
tinea cruris
ringworm of the groin
tinea pedis
athlete’s foot
tinea manuum
tinea of the hands
tinea infections more common in
warmer climates
most common fungal infection in USA
athelete’s foot
tinea capitus clinical presentation
typically toddler or school age kid
painless bald spot
may have 3 apprearances- black dot, gray patch, kerion (large bright red boggy bump)
tinea corporis clinical presentation
erythematous round and elevated pruritic lesion that grows in size and starts to clear in center
classic shape of ringworm
tinea cruris clinical presentation
typically obese man with pruritic rash on groin that spreads to medial upper thigh
“jocks itch”
tinea pedis clinical presentation
strong foot odor
macerated soft whitened skin between toes
tinea versicolor
hypopigmented spots, mild pruritus
normally on back
fungal culture recommended for
onychomycosis and tinea capitis
tinea infection treatment (not capitis or onchomycosis)
2-4 week topical treatment with azole class meds
continue at least 1 week after lesion has cleared
tinea capitis treatment
oral systemic antifungal along with topical
treatment of choice: griseofulvin po bid for 2-4 months
tinea versicolor treatment
topical selenium sulfide lotion applied daily x7 days from neck to waist
repeated once weekly x1 month, then once month for maintenance
hypopigmented spots may take longer to resolve
tinea follow up
2 weeks
onychomycosis
benign superficial infection of the toenails and fingernails
young/middle aged bothered more by appearance
nail discoloration
first or fifth most likely to be affected
onychomycosis treatment
itraconazole
terbinafine
monitor liver function tests
onychomycosis follow up
check liver function test q4 weeks, follow up first on fourth week and then q 4-6 weeks
impetigo
contagious, superficial vesiculopustular infection of skin commonly seen infants/children
spread through direct contact among people
typically includes staph aureus and strep together
impetigo risk factors
insect bite
warm weather
impetigo clinical presentation
pruritus from lesions, red crusty rash spreading, normally on face or extremities
diagnostic testing for impetigo
bacterial culture and sensitivity
gram positive cocci