13- Acne Flashcards
What is the primary lesions of acne
Comedo
Types of acne scars
- Ice pick- temples and cheeks
- Box car
- Rolling
- Anetoderma type (atrophic)
- Hypertrophic
Most neonatal acne remit by age ___
1 year old
Acne onset from what age is considered as preadolescent acne?
7-12y
The combination of these 3 elements in acne formation leads to the release of proinflammatory mediatorsβ‘οΈ formation of inflammatory lesions
Keratin
Sebum
Microorganisms- propionibacterium acnes
Screening tests to exclude a virilizing tumor for severe acne resistant to therapy, relapse quickly or sudden onset
Serum dehydroepiandrosterone (DHEAS) Serum testosterone
2 weeks before onset of menses
Most common cause of treatment failure in acne
Lack of adherence
Treatment for mild comedonal acne
1st line: topical retinoid + physical extraction
2nd line: alternate retinoid, salicylic, azelaic acid
Treatment for mild papular/pustular acne
1st line: topical antimicrobial + topical retinoid, benzoyl peroxide wash if mild truncal lesions
Treatment for moderate papular/pustular acne
1st line: Oral antibiotics + topical retinoid + benzoyl peroxide
2nd line: alternate antibiotic, topical retinoid, benzoyl peroxide
Women: spironolactone + OCP + topical retinoid +/- topical antibiotic and/or benzoyl peroxide
Isotretinoin- relapse quickly off oral antibiotics, does not clear or scars
Treatment for severe acne
Nodular/conglobate
Isotretinoin
Oral antibiotic + topical retinoid + benzoyl peroxide
Women: spironolactone + OCP + topical retinoid +/- topical or oral antibiotic and/or benzoyl peroxide
Preferred agents in maintenance therapy of acne
Topical retinoids
Oral antibiotic for pregnant women with acne
Amoxicillin 500mg TID
Known side effect of clindamycin that limits its use
150mg TID
Pseudomembranous colitis
Antiandrogen treatment prescribed in combination with OCP in the treatment of acne
Spironolactone 100mg ODHS
Dose of isotretinoin for severe acne
0.5-1mg/kg/day OD or BID
Starting: 20-40mg/day