SARAH MICHELLE CRASH COURSE
STUDY GUIDE SOLUTION NEW UPDATE
2025
/. Contact dermatitis - Answer-- linear distribution, localized
-Treatment: topical steroids
/.Vesicular lesions - Answer-treat within 48-72 hours with antiviral medication.
/.Chronic ulcerative stomatitis - Answer-- autoimmune
- larger in size and number
-weeks-months to resolve
-resistant to topical steroids
-Treatment: Hydroxychloroquine.
/.Impetigo - Answer--Honey crusted
-Yellow-dry drainage
-usually on face
-Bullous vs. Nonbullies
-Bullous typically MRSA, Treatment is doxycycline
/.Pityriasis rosacea - Answer-"CHRISTMAS TREE" pattern rash (rash on CLEAVAGE
lines). "HERALD PATCH" - spreads to back and abdomen
-usually goes away on own
/.Brown recluse spider bite - Answer-- possible white halo
-Systemic symptoms
/.Erythema Migrans (Lyme disease) and RMSF - Answer-- Treatment is doxycycline
-RMSF: North Carolina, tick bite, rash on palms/soles
-3-5 days after symptoms begin
-Lyme disease: "bulls' eyes"/Target lesion
- doxycycline (amoxicillin if pregnant).
/.Measles (Rubeola) - Answer-- kolpiks spots
- fever
-cough, congestion, conjunctivitis
-3-5 days after initial symptoms, rash
- Koplik spots are tiny grains of white sand.
- Give MMR at 12 months to prevent reoccurrence.
/.Mumps - Answer-- parathyroid gland swelling (also seen in bulimia)
,- salivary gland stone
/.Actinic keratosis - Answer-- dry, scaly lesions on sun-exposed area
-pink, yellow, tan, pale, brown
-Treatment: topical 5FU, cryotherapy
- precursor to squamous cell carcinoma
/.Cafe-au lait spots - Answer-- hyperpigmentation
-typically, benign
-> 6-8, underlying neurofibromatosis
/.Intertrigo - Answer-- rash present in skin folds
-minimize moisture, antifungal, topical steroids
/.Malignant melanoma - Answer--asymmetry, border color, diameter > 6mm, evolution
- black/brown spot under nail vs. splinter hemorrhage (endocarditis).
/.Seborrheic keratosis - Answer--"pasted on", older adults
- benign
/.Basal cell carcinoma - Answer--shiny, waxy, pearly
- telangiectasias present= visible blood vessels across lesion.
- most common type of skin cancer
-Biopsy, refer to dermatology.
/.Atopic dermatitis (Eczema) - Answer--intensely pruritic, itch, scratch, itch cycle
- located on flexor surfaces (creases)
- 3 A's (atopic dermatitis, asthma, allergies)
- Treatment: emollients, topical steroids
/.nummular eczema - Answer--high-potency steroids for treatment
-simple, round, arms and legs
-underlying atopic dermatitis
/.Plaque psoriasis - Answer--Auspitz sign vs. Koebner phenomenon.
- thick, silverly scales that are present
-Treatment: topical steroids, emollients, or coal tar
-Auspitz sign: plaques are scratched, pin-point bleeding
-Koebner phenomenon: Trauma to skin leading to plaques formation.
/.Shingles - Answer--vesicular, follows a dermatome
-burning, tingling before rash appears
-new pain on one side of the body
-Shingrix at age 50
-Immunocompromised patients > 18 years old
-Treat within 48-72 hours of symptom onset
,-Acyclovir is the cheapest antiviral
-Shingles near eyes: refer to ophthalmology (risk for permanent cornea scarring and
even blindness).
/.Scabies - Answer--intensely pruritic
-everyone in house with similar symptoms
-hands, between fingers
-Treatment: permethrin cream, wash everything with hot water.
/.Varicella (Chicken pox) - Answer--varying stages of healing lesions
-varicella vaccine: > 12 months old
-return to school when all lesions are crusted over
/.Head lice (Pediculosis capitis) - Answer--Pediatric, all ages
-incessant of the scalp
-super contagious
-Treatment: permethrin (Nix) (only kills live lice), nits and eggs need to be combed out,
child may require second treatment.
-wash clothing/bedding in hot water.
/.Mollosum contagiosium - Answer--little indent in middle of lesion, lesion umbilicate or
having a dimpling.
-flesh colored
-highly contagious
-found in groin on child, suspect sexual abuse (STI).
-Treatment: usually resolve on own
/.Anthrax lesion - Answer--may see on a cattle farmer
-ulcerated and black
-lesion is painless
-Treatment: fluroquinolone (if no systemic involvement) = ciprofloxacin, tetracycline as
an alternative.
/.Hidradenitis suppurativa - Answer--risk factors are smoking and obesity
-recurrent issue
-can lead to nodules, pustules, or even abscesses in the sweat glands
-groin, axilla, thighs, under breasts
-not related to poor hygiene, more linked to genetics
-Treatment: NSAIDs, warm compresses, topical clindamycin. Severe= I&D, wound
culture, antibiotics > 2 weeks.
/.Folliculitis - Answer--skin infection of hair follicles and surrounding tissue
-usually resolves on own
-Treatment: warm compresses, mupirocin, PCN, cephalexin
/.Rosacea - Answer--erythematous facial rash
, -does not spare the nasabial folds
-Treatment: behavior modifications, sun protection, metronidazole gel/cream
(inflammatory= papules and pustules).
/.Malar rash (Butterfly rash) - Answer--rash across nose and cheekbones
-spares the nasolabial folds
-commonly associated with lupus
-also seen with Sjogren's syndrome= dry mouth and eyes
/.Superficial cellulitis (Erysipeias) - Answer--Sharpley defined borders
-superficial and red
-Treatment: PCN or cephalexin.
/.Purulent and non-purulent cellulitis - Answer--incredibly erythematous
-swollen
-non purulent treatment: PCN, cephalexin
-Purulent (Poss MRSA) Treatment: BCD (Bactrim, clindamycin, Doxycycline).
/.Acne - Answer--topical applications= benzoyl peroxide
-topical antibiotics= tretinoin (keep pores from clogging up)
-PO ABX: Doxycycline. Topical: Clindamycin.
-wear sunscreen
-Derm, Accutane. Black box warning: do not become pregnant (2 forms of birth control).
/.Geographical tongue - Answer--spicy or hot foods
-benign
/.Leukoplakia vs. Oral candidiasis - Answer-- scrapes off? = yeast
- leukoplakia= refer to dentist
-mostly seen in HIV= detrimental to enamel.
/.fifth disease - Answer--slapped cheek rash
-fever > rash, lacy net-like
-when rash appears, no longer contagious
-Treatment: self-limiting
-stay away from pregnant women and not immune= miscarriage.
/.Ring worm - Answer--annular rash
-capitis= head
-bulbae= beard
-crurs=groin
-pedis= foot
-versicolor= all over body= AFC for treatment
-Treatment: AFC
/.Enterobiasis (pinworms) - Answer--genital are pruritic at night
STUDY GUIDE SOLUTION NEW UPDATE
2025
/. Contact dermatitis - Answer-- linear distribution, localized
-Treatment: topical steroids
/.Vesicular lesions - Answer-treat within 48-72 hours with antiviral medication.
/.Chronic ulcerative stomatitis - Answer-- autoimmune
- larger in size and number
-weeks-months to resolve
-resistant to topical steroids
-Treatment: Hydroxychloroquine.
/.Impetigo - Answer--Honey crusted
-Yellow-dry drainage
-usually on face
-Bullous vs. Nonbullies
-Bullous typically MRSA, Treatment is doxycycline
/.Pityriasis rosacea - Answer-"CHRISTMAS TREE" pattern rash (rash on CLEAVAGE
lines). "HERALD PATCH" - spreads to back and abdomen
-usually goes away on own
/.Brown recluse spider bite - Answer-- possible white halo
-Systemic symptoms
/.Erythema Migrans (Lyme disease) and RMSF - Answer-- Treatment is doxycycline
-RMSF: North Carolina, tick bite, rash on palms/soles
-3-5 days after symptoms begin
-Lyme disease: "bulls' eyes"/Target lesion
- doxycycline (amoxicillin if pregnant).
/.Measles (Rubeola) - Answer-- kolpiks spots
- fever
-cough, congestion, conjunctivitis
-3-5 days after initial symptoms, rash
- Koplik spots are tiny grains of white sand.
- Give MMR at 12 months to prevent reoccurrence.
/.Mumps - Answer-- parathyroid gland swelling (also seen in bulimia)
,- salivary gland stone
/.Actinic keratosis - Answer-- dry, scaly lesions on sun-exposed area
-pink, yellow, tan, pale, brown
-Treatment: topical 5FU, cryotherapy
- precursor to squamous cell carcinoma
/.Cafe-au lait spots - Answer-- hyperpigmentation
-typically, benign
-> 6-8, underlying neurofibromatosis
/.Intertrigo - Answer-- rash present in skin folds
-minimize moisture, antifungal, topical steroids
/.Malignant melanoma - Answer--asymmetry, border color, diameter > 6mm, evolution
- black/brown spot under nail vs. splinter hemorrhage (endocarditis).
/.Seborrheic keratosis - Answer--"pasted on", older adults
- benign
/.Basal cell carcinoma - Answer--shiny, waxy, pearly
- telangiectasias present= visible blood vessels across lesion.
- most common type of skin cancer
-Biopsy, refer to dermatology.
/.Atopic dermatitis (Eczema) - Answer--intensely pruritic, itch, scratch, itch cycle
- located on flexor surfaces (creases)
- 3 A's (atopic dermatitis, asthma, allergies)
- Treatment: emollients, topical steroids
/.nummular eczema - Answer--high-potency steroids for treatment
-simple, round, arms and legs
-underlying atopic dermatitis
/.Plaque psoriasis - Answer--Auspitz sign vs. Koebner phenomenon.
- thick, silverly scales that are present
-Treatment: topical steroids, emollients, or coal tar
-Auspitz sign: plaques are scratched, pin-point bleeding
-Koebner phenomenon: Trauma to skin leading to plaques formation.
/.Shingles - Answer--vesicular, follows a dermatome
-burning, tingling before rash appears
-new pain on one side of the body
-Shingrix at age 50
-Immunocompromised patients > 18 years old
-Treat within 48-72 hours of symptom onset
,-Acyclovir is the cheapest antiviral
-Shingles near eyes: refer to ophthalmology (risk for permanent cornea scarring and
even blindness).
/.Scabies - Answer--intensely pruritic
-everyone in house with similar symptoms
-hands, between fingers
-Treatment: permethrin cream, wash everything with hot water.
/.Varicella (Chicken pox) - Answer--varying stages of healing lesions
-varicella vaccine: > 12 months old
-return to school when all lesions are crusted over
/.Head lice (Pediculosis capitis) - Answer--Pediatric, all ages
-incessant of the scalp
-super contagious
-Treatment: permethrin (Nix) (only kills live lice), nits and eggs need to be combed out,
child may require second treatment.
-wash clothing/bedding in hot water.
/.Mollosum contagiosium - Answer--little indent in middle of lesion, lesion umbilicate or
having a dimpling.
-flesh colored
-highly contagious
-found in groin on child, suspect sexual abuse (STI).
-Treatment: usually resolve on own
/.Anthrax lesion - Answer--may see on a cattle farmer
-ulcerated and black
-lesion is painless
-Treatment: fluroquinolone (if no systemic involvement) = ciprofloxacin, tetracycline as
an alternative.
/.Hidradenitis suppurativa - Answer--risk factors are smoking and obesity
-recurrent issue
-can lead to nodules, pustules, or even abscesses in the sweat glands
-groin, axilla, thighs, under breasts
-not related to poor hygiene, more linked to genetics
-Treatment: NSAIDs, warm compresses, topical clindamycin. Severe= I&D, wound
culture, antibiotics > 2 weeks.
/.Folliculitis - Answer--skin infection of hair follicles and surrounding tissue
-usually resolves on own
-Treatment: warm compresses, mupirocin, PCN, cephalexin
/.Rosacea - Answer--erythematous facial rash
, -does not spare the nasabial folds
-Treatment: behavior modifications, sun protection, metronidazole gel/cream
(inflammatory= papules and pustules).
/.Malar rash (Butterfly rash) - Answer--rash across nose and cheekbones
-spares the nasolabial folds
-commonly associated with lupus
-also seen with Sjogren's syndrome= dry mouth and eyes
/.Superficial cellulitis (Erysipeias) - Answer--Sharpley defined borders
-superficial and red
-Treatment: PCN or cephalexin.
/.Purulent and non-purulent cellulitis - Answer--incredibly erythematous
-swollen
-non purulent treatment: PCN, cephalexin
-Purulent (Poss MRSA) Treatment: BCD (Bactrim, clindamycin, Doxycycline).
/.Acne - Answer--topical applications= benzoyl peroxide
-topical antibiotics= tretinoin (keep pores from clogging up)
-PO ABX: Doxycycline. Topical: Clindamycin.
-wear sunscreen
-Derm, Accutane. Black box warning: do not become pregnant (2 forms of birth control).
/.Geographical tongue - Answer--spicy or hot foods
-benign
/.Leukoplakia vs. Oral candidiasis - Answer-- scrapes off? = yeast
- leukoplakia= refer to dentist
-mostly seen in HIV= detrimental to enamel.
/.fifth disease - Answer--slapped cheek rash
-fever > rash, lacy net-like
-when rash appears, no longer contagious
-Treatment: self-limiting
-stay away from pregnant women and not immune= miscarriage.
/.Ring worm - Answer--annular rash
-capitis= head
-bulbae= beard
-crurs=groin
-pedis= foot
-versicolor= all over body= AFC for treatment
-Treatment: AFC
/.Enterobiasis (pinworms) - Answer--genital are pruritic at night
