Exam 1 Flashcards
Types of alopecia
Scarring and Nonscarring
Medications for treating alopecia
Finasteride (Propecia), Minoxidil (Rogaine)
Finasteride (Propecia) considerations
Use in men only because causes birth defects in women; check liver functions. SE includes ED
Side effects of Minoxidil (Rogaine)
pruritis, dryness, scaling, hypertrichosis (excessive body hair)
Describe vitiligo
Loss of color in patchy areas of body; white macules/patches of sun-exposed skin often caused by autoimmune diseases
Describe Chloasma
“mask of pregnancy”;a pigmentation disorder of the skin characterized by darker skin patches that primarily affect the face and other sun-exposed areas.; caused by increased estrogen, progesterone
Dx for chloasma
PMH/HPI, Wood’s lamp to visualize excess melanin in epidermis
Describe melasma
Darker patches to any area regardless of pregnancy; causes by sun exposure and hormone changes
Dx for melasma
PMH, hormone levels
What drugs can cause drug-induced skin pigmentation changes?
amiodarone, chlorpromazine, antimalarials
Describe the skin pigmentation changes in addison’s disease
Increased pigmentation on skin creases, skin folds, palmar creases, pressure points
What systemic diseases can cause pruritis?
CKD, hyperbilirubinemia
HPI for rash
Onset, spread, change, associated symptoms (pruritis, pain), Food or medications, Atopic hx, infectious disease exposure, systemic symptoms
Define urticaria
An IgE reaction causing hives or wheals associated with severe itching; ANGIOEDEMA is considered a type of urticaria
Management of urticaria
-Isolate, treat cause
-Avoid ASA, ACE inhibitors, NSAIDs
-Avoid allergens
Medication for management of urticaria
Antihistamines: hydroxyzine, diphenhydramine, loratadine, cetirizine
Vesicle vs Bulla
Vesicle- < 0.5 cm in diameter
Bulla- > 0.5 cm in diameter
Describe scabies
highly contagious mite infestation causing intractable pruritis that is worse at night between fingers, periumbilic, ankles, axilla, pelvis
Objective finding for scabies
1-2mm red papules with crusting/scaling from scratching’ intraepidermal burrow
Diagnostics for scabies
Burrow ink test with microscope identification
Symptom management for scabies
Antihistamines and topical steroids to help with pruritis
1st line treatment for scabies
permethrin
Tx for persistent severe pruritis with scabies
Ivermectin x1 followed by another in 1-2 weeks
ABX for secondary scabies infection d/t waiting for treatment
Cephalexin or Dicloxacillin x 7-10 days
Education for scabies
-F/U 1 week
-Trim nails
-Wash bed sheets and linens in hot water
-Itching may continue for a week after successful treatment
-May have to repeat treatment
Describe pediculosis
lice, spread by close personal contact and causing intense itching and 2-3mm red, erythematous macules or papules
Follow-up for pediculosis
-Reevaluate after 1 week, retreat if necessary
-Screen all close contacts for lice
Tx for lice
permethrin lotion 1% or 5% cream, nix cream, shampoos (pyrethrin), benzyl alcohol, ivermectin, lindane is second-line
Application of permethrin or other topical agents for pediculosis
-Use nit-remover products before application
-Apply to towel-dried, affected area; leave on for 10 minutes and then wash off.
Patient education for pediculosis
-Do not share hats, combs, scarves, headsets, towels, or bedding
-Combs and brushes should be washed in hot, soapy water and allowed to air dry
-Bedclothes and clothing should be washed in hot soapy water and dried in a hot dryer
-Screen children once a week for head lice
Describe candidiasis
A fungal infection that can affect the mouth, vagina, tip of penis, fingertip (paronychia), or under nail bed
Clinical presentation of different kinds of candidiasis
Oral-Severe sore throat, dysphagia; white patches on tongue easily scraped with a tongue blade
Vaginal- burning, itching, irritation on vulva and vagina; erythema with white curdlike patches
Balanitis- reddish rash and itching on glans of penis
Intertriginous candidiasis- red itchy rash that is occasionally “weepy”
Paronychia- painful fingertip that is red, hot, swollen
Subungual- yellow fingernails for several weeks or months; no pain or itching
How are fungal infections usually diagnosed?
by their classic appearance; candidal/fungal cultures can be obtained for resistant cases; for vaginal candidiasis- a saline wetmount, pH paper, or potassium hydroxide test
Prescription medications for candidiasis
-Topical antifungals (nystatin, clotrimazole) applied BID for 2-4 weeks
-First line for oral candidiasis: clotrimazole troches 10 mg five times a day
Management of paronychia
warm compress, possible I/D, systemic antifungals
Topical medications for Tx of candidiasis
Nystatin, clotrimazole, miconazole
Describe dermatophytosis
-Also known as tinea- superficial infection caused by fungus typically spread by contact with persons, animals, or soil
-Capitis-scalp
-Cruris- groin
-Manuum- hands
-Corporis- body
Clinical presentation of tinea capitis
painless patchy alopecia; no erythema, “black dot” from broken hair stubbles
Clinical presentation of tinea corporis
“ringworm”: ringlike lesions with bright red elevated border covered with scales
Clinical presentation of tinea cruris
extremely pruritic, lichenification from chronic scratching
Considerations when prescribing systemic antifungals
-Obtain baseline liver function progile and repeat again in 4 weeks and periodically thereafter during course of treatment
-For Griseofulvin check CBC at baseline and 4 weeks
Management of dermatophytosis (tinea)
If on scalp & nails: systemic antifungals (Monitor CBC, LFTs)
Topical antifungals ending in ‘-azole’ (miconazole/clotrimazole/ketoconazole)
What is onychomycosis?
A benign infection of toenail or fingernail caused by a dermatophyte fungus; causes thickened, dystrophic nails with cloudy to black discoloration
Treatment for onychomycosis
Systemic antifungals: Itraconazole or terbinafine
What is impitigo?
A highly contagious bacterial infection caused by staph aureus
S&S of impetigo
classic presentation: pruritis from lesions; red, crusty rash that is spreading; rash is located on face or extremities; easily ruptured vesicle with “honey-colored” crust
Topical Tx for impetigo
mupirocin BID x 5 days, chlorhexidine 2-3x/day
Systemic Tx for impetigo
-Dicloxacillin or cephalexin x 7 days
What to prescribe if suspecting MRSA infection with impetigo?
Systemic ABX: Doxycycline, clindamycin, bactrim
Pt education for impetigo
-F/U 14 days
-Handwashing, short nails
-Avoid school/daycare for 24 hours after ABX start
-Wash lesions with antibacterial soap before applying topicals
Non-pharmacological management of folliculitis
-Gentle cleansing by washing the skin twice a day with antibacterial soap (Dial)
Tx for folliculitis
Topical mupirocin (bactroban), retapamulin, clindamycin, erythromycin, keoconazole for 5-7 days
What is a furuncle?
a deep follicle infection often caused by S. aureus; multiple furuncles in a contiguous area are called a carbuncle
Difference between carbuncle and furuncle
Furuncle- deep bacterial infection of a hair follicle with abscess formation
Carbuncle- large, multioculated abscess comprising multiple furuncles in a contiguous area
Treatment for furuncle verses carbuncle
Furuncle- treat with I&D
Carbuncle- systemic antibiotics such as dicloxacillin, cephalexin, bactrim, or doxycyline
Patient education for furuncles and carbuncles
-Do not pop, squeeze, or manipulate furuncles (esp those in upper lip or nasolabial folds) due to risk of cavernous sinus thrombosis
What is cellulitis?
a bacterial infection of skin involving dermis and SQ tissue common caused by Streptococcus or S. aureus
Rx factors for cellulitis
DM, HIV/AIDS, Drug/alcohol abuse, PVD, chronic steroid use
Considerations for determining treatment for cellulitis
-Severity of infection
-Site of infection
-Presence of underlying disease
-Virulence of the pathogen
Tx for uncomplicated cellulitis
PCN, clindamycin, cephalexin x5 days; if PCN allergy- clindamycin, azithromycin
If from bite- Augmentin for 2 weeks
Pharmacologic recommendations for management of skin and soft tissue infections in primary care
For mild infections: PCN VK, Cephalosporin, Dicloxacillin, Clindamycin PO
For moderate-severe: Emergency department for IV ABX or surgery referral
Pt education for cellulitis
-RTC if no improvement in 48 hours or worsening infection
-Elevate affected limb
Tx options for warts
First line treatments are 17% salicylic acid and cryotherapy with liquid nitrogen
Patient education for warts
-Limit shaving of the area until warts are eradicated
-Do not bite nails
-Avoid scratching or rubbing warts
-Wear protective foot covering in wet public areas
Common cause of warts
HPV
S&S of oral HSV
fever, sore throat, hypersalivation, painful vesicles/ulcers on tongue or in mouth, swollen lymph nodes
Diagnostic tests for HSV
Viral culture, DNA studies
Tx for HSV 1
ice, lip ointment, OTC topical Abreva, Penciclovir 1% if extensive, Tylenol, oral anesthetics such as xylocaine 2%
Tx for HSV2
PO antivirals: Valacyclovir, famcyclovir, warm compress, oatmeal sitz bath, rest, increase fluids
Patient information for HSV
-Fever, stress, sunlight, and menses can trigger recurrence of lesions
-Burning/tingling can be first sign of recurrence
-Begin antiviral therapy at first sign of infection
-RTC if symptoms persist past 10 days
-Use condoms, avoid sexual intercourse until wounds are healed
-Blow dryer on the cool setting can be used to dry genital lesions
What is atopic dermatitis?
an inherited skin reaction that usually begins in infancy; also called eczema
“Atopic triad”
asthma, allergic rhinitis, and eczema
“The itch that rashes”
Atopic dermatitis
Objective finding with atopic dermatitis
-Erythema
-Lesions are excoriated, maculopapular, and inflamed
-Symmetrical lesions that are crusting and excoriated
-Later: crusted, scaly, thickened, lichenified
What is the primary aim in management of atopic dermatitis?
control signs and symptoms because no cure exists: decrease pruritis, prevent infection
DDX for atopic dermatitis
scabies, psoriasis, tinea, allergic reactions
Non-pharmacological treatment for atopic dermatitis
HYDRATION!
-mild emollients (cetaphil)
-baths over showers with liberal application of moisturizer after
-avoid soaps with perfumes or coloring agents
-Ointments (vaseline)
-Humidifier
Pharmacological management for atopic dermatitis
-Burow’s solution to be applied as a compress for 20-30 minutes followed by OTC corticosteroids
-Tricyclic antidepressants such as doxepin (sinequan)- have potent antihistaminic activity
-Montelukast (singulair) 5-10 mg daily
-Apply topical corticosteroids after skin hydration
What is the cardinal symptom of contact dermatitis?
a pruritic erythematous rash
Patient education for atopic dermatitis
-watch/avoid triggers, avoid allergens, keep living areas cool, reduce sweating
Non-pharmacological management for contact dermatitis
Identify cause and avoid
wash with soap and water or with isopropyl alcohol asap after exposure to known irritant (poison ivy/oak)