Module 1 Flashcards
most common skin condition in USA
acne vulgaris
Acne vulgaris has the highest incidence among individuals aged
12 to 25 years, with incidence peaking at 15 years of age.
closed comedones
(“whiteheads”
open comedones
blackheads
Although androgen excess may lead to acne formation
, most individuals with acne do not overproduce androgens. However, their pilosebaceous glands are likely hypersensitive to these hormones and more prone to retention hyperkeratosis
mild acne
, lesions are primarily noninflammatory comedones with occasional small papules.
face, chest, neck
moderate acne
, lesions are mainly inflammatory lesions such as papules and pustules. The papules range in size from a few millimeters to one-half centimeter. The color of the acne papules in light-skinned patients ranges from light pink to bright red.
Scarring is more likely with
larger and deeper pustules
severe acne
severe acne, or nodulocystic acne, lesions are mainly nodules and cysts. This form of acne always results in scar formation
more common in males
acne conglobat
a is severe cystic acne in which nodules, cysts, and abscesses develop; lesions are predominantly located on the trunk area instead of the face. Females with acne conglobata should be evaluated for polycystic ovary syndrome (PCOS)
acne fulminan
s is rare and is seen in young adolescent males. This condition is characterized by acute onset of multiple painful, ulcerated acne lesions, along with systemic symptoms such as fever, chills, malaise, and generalized joint and muscle aches.
rosacea
Rosacea, previously termed “acne rosacea,” should be ruled out. Rosacea is more common in adults and older patients and is located more centrally on the face, cheeks, chin, and nose. Comedones are never found in rosacea. There is a tendency for easy flushing in response to alcohol or heat. Telangiectasias (dilations of small groups of superficial blood vessels) may be present at the skin surface. Rosacea can be accompanied by eye complaints such as excessive dryness and irritation, and it is more common in patients of Irish, Scottish, or English descent.
hot tub folliculitis
“hot tub folliculitis” (folliculitis lesions caused by Staphylococci), which appears within 1 to 4 days after hot tub use, due to insufficient temperature and inadequate chlorination of the water. Patients will complain of small red pustules that are occasionally pruritic. Folliculitis is located on the areas of the body that were immersed in the water, such as the lower torso, buttocks, and legs.
primary goal of acne treatment
is to prevent and/or minimize scarring and permanent pigmentation changes
topical tx for comedonal acne
topical retinoids (Retin-A)
dryness, erythema, scaling
topical tx inflammatory acne
topical abx
applied once-twice daily, refrigerate when stored
Systemic Antibiotic and Hormonal Treatment of Moderate to Severe Acne
if have not responded to topical meds x2-3 months
moderate-severe
doxycycline, minocycline
doxycycline
take with full glass of water
se: photosensitive, GI upset
do not take with antacids, dairy product, iron vitamins
severe acne tx
derm referral
tretinoin tx
0.5mg/kg daily in two divided doses, increase gradually
SE: dry skin, hypertriglyceridemia
acne f/u
every 4-6 weeks to evalaute response
Rosacea is characterized by flare-ups that include three cutaneous components
the first component is vascular in nature, with persistent erythema that primarily involves the central face
he second component is cutaneous and involves the development of recurrent acneiform, erythematous papules and pustules around the central face. The third component consists of connective tissue hyperplasia around the central face with discrete sebaceous gland hyperplasia, consisting of persistent yellow papules particularly around the nose
rosacea tx
metronidazole cream, may take 6-8 weeks to work
ABX if flare (tetracycline, minocycline, doxycycline)
Seborrheic keratosis
is one of the most common noncancerous skin growths seen in older adults. It is characterized by benign, warty-appearing growths that are usually found on the trunk, but they may also be seen on the hands and face. They develop in both sun-exposed and sun-protected areas
Seborrheic keratosis tx
does not require tx
removal if symptomatic
ABCDEs of malignant melanoma.
A = asymmetry
B = border irregularity
C = color change
D = diameter larger than a pencil eraser (greater than 6 mm)
E = an evolving lesion (changing over time); may also be used for elevated, as in a raised lesion
Actinic keratosis (AK
), also called solar keratosis and senile keratosis, is the most common precancerous skin lesion found in lighter-skinned (white) patients. They are found on sun-exposed areas of skin that have been damaged by cumulative sun exposure
rough or scaly rash
removal indicated
All melanomas should be tested for mutations in
BRAF, a gene involved in cell growth signaling,
Basal cell carcinoma
(BCC) is a malignant tumor of the skin that originates in the basal cells of the epidermis. It is a slow-growing and locally invasive tumor that rarely metastasizes. It represents the beginning of a continuum of skin cancers in both severity and mortality.
Squamous cell carcinoma
(SCC), a malignant tumor originating from keratinocytes, can invade the dermis and occasionally metastasize to distant sites.
more common of the two nonmelanomatous skin cancers and the most common type of skin cancer overall
basal cell
The most important risk factor for both BCC and SCC is
chronic accumulated sun exposure
A typical patient with nonmelanomatous skin carcinoma is an adult or elderly patient who presents with
complaints of a spot or a bump that is getting larger or a sore that is not healing. Often the lesion appears as a thick, rough patch that may bleed if scratched or scraped.
surgery has the highest cure rate for both BCC and SCC.
Mohs microsurgery
Refractory errors include
myopia, hyperopia, astigmatism, and presbyopia
what is responsible for central visual acuity
macula of retina, most important portion of retina for distinguishing visual details
Light ray convergence in front of the retina causes
myopia, or near-sightedness
If light rays converge posterior to the retina, the patient is
hyperopic, or farsighted.
if light rays focus on two separate lines rather than a single point, the patient has .
astigmatism
refractive error presentation
change in vision, headache
gradual onset
not typically accompanied by pain
worsened visual acuity
the lens of eye cannot
shed unviable cells
3 types of cataracts
nuclear- significant near sightedness
cortical- no significant impairment to vision
posterior- haze, severe glare in bright light, associated with steroid use, faster progression
Age-related cataracts tend to be
bilateral in nature and may manifest as blurred or distorted vision, with complaints of a glare when driving at night or in bright light
Glaucoma is defined as
a group of diseases characterized by progressive damage to the optic nerve, resulting in optic nerve atrophy and blindness, most typically associated with elevated intraocular pressure
most common glaucoma
open angle, is characterized as a chronic form of the disorder that, before loss of peripheral visual fields, is asymptomatic. It has an excellent prognosis if treated early and appropriately
angle closure glaucoma
most often associated with acute episodes of significant eye pain, redness, and acute visual loss, which, if untreated, may rapidly lead to permanent blindness.
most common cause blindness in African Americans
glaucoma
open angle glaucoma presentation
asymptomatic until optic nerve damage advanced
gradual onset, slow painless bilat periph vision loss, poor night vision
angle-closure glaucoma
a rapid onset, with unilateral pain and pressure, blurred vision, seeing halos around lights, and photophobia, followed by loss of peripheral vision, subsequently followed by central vision loss
unreactive pupil
Normal intraocular pressure is
12 to 22 mm Hg.
tx goal glaucoma
prevent progression of damage
decrease intraocular pressure
1st line therapy glaucoma
beta blocker or prostaglandin
meds given during acute glaucoma attak
diamox or IV mannitol
Diabetic retinopathy
is a noninflammatory disorder of the retina that develops in patients with diabetes mellitus.
3 stages diabetic retinopathy
- background diabetic retinopathy, (2) preproliferative diabetic retinopathy, and (3) proliferative diabetic retinopathy.
leading cause of new cases of legal blindness among Americans aged 20 to 64
diabetic retinopathy
Almost all patients with diabetes will develop background diabetic retinopathy after they have had diabetes for at least .
20 years
background diabetic retinopathy fundoscopic exam
, microaneurysms, intraretinal hemorrhage, macular edema, and lipid deposits may be apparent.
The only pharmacologic agent that has been found to slow the progression of diabetic retinopathy is
lisinopril, an angiotensin-converting enzyme inhibitor.
the leading cause of blindness in patients older than 60 years
macular degeneration
dry macular degeneration
characterized by slow, progressive atrophy and degeneration of the retina
wet macular degeneration
new blood vessels develop under the retina in the macula, causing a sudden distortion or loss of central vision
Vision that corrects with the pinhole test implies an
uncorrected refractive error.