Msk Dermatology · Year 2 · from Msk Dermatology
Case 1: Severe Nodulocystic Acne
Patient Presentation
Demographics: 17-year-old male
Chief Complaint: Severe facial acne for 2 years, worsening despite treatment
History of Present Illness: The patient has had progressive acne since age 15. Initial treatment with over-the-counter benzoyl peroxide and adapalene showed minimal improvement. He was subsequently treated with topical retinoids and oral doxycycline for 6 months with limited response. He now has painful nodules and cysts on his face, chest, and back. He is developing acne scars and reports significant emotional distress and social isolation.
Past Medical History:
- No significant medical history
- No known drug allergies
Medications:
- Previously tried: benzoyl peroxide, adapalene, clindamycin gel, doxycycline
Physical Examination:
- Face: Multiple open and closed comedones, inflammatory papules and pustules, deep nodules and cysts (some with purulent drainage)
- Scarring: Ice-pick and boxcar scars on cheeks
- Chest and back: Extensive nodules and cysts
- No signs of hidradenitis suppurativa
Workup and Results
Assessment:
- Severe nodulocystic acne (Grade IV)
- Inadequate response to conventional therapy
- Candidate for isotretinoin
Pre-Treatment Evaluation:
- CBC: Normal
- Liver function tests: Normal
- Fasting lipid panel: Total cholesterol 175 mg/dL, triglycerides 120 mg/dL
- Pregnancy test: Not applicable (male patient)
Clinical Image
Clinical photograph demonstrating severe nodulocystic acne with multiple inflammatory nodules, cysts, comedones, and early scarring on the face, characteristic of Grade IV acne vulgaris.
Diagnosis
Severe Nodulocystic Acne (Grade IV) - Isotretinoin Candidate
Acne pathogenesis involves four key factors:
- Sebum overproduction
- Follicular hyperkeratinization
- Cutibacterium acnes colonization
- Inflammation
Discussion
This case illustrates severe acne requiring systemic treatment:
- Four Pathogenic Factors: The lecture describes the four main pathogenic factors in acne: sebum overproduction, follicular hyperkeratinization, C. acnes colonization, and inflammation. Severe nodulocystic acne involves all four factors in extreme form.
- Isotretinoin Indication: The lecture notes that isotretinoin is reserved for severe nodulocystic acne or acne unresponsive to conventional therapy. It is the only medication that addresses all four pathogenic factors.
- iPLEDGE Program: The lecture emphasizes that the iPLEDGE program is mandatory for isotretinoin due to its teratogenicity. While this male patient does not require pregnancy testing, he must still be registered in the program.
- Benzoyl Peroxide Resistance: The lecture highlights that benzoyl peroxide does not cause bacterial resistance, making it valuable as a combination therapy and helping explain why it should be combined with antibiotics.
Treatment Plan
- Isotretinoin Therapy:
- Starting dose: 0.5 mg/kg/day
- Target cumulative dose: 120-150 mg/kg
- iPLEDGE enrollment and monthly registration
- Monitoring:
- Monthly liver function tests and lipid panels
- Monitor for mood changes and depression
- Pregnancy test monthly for female patients
- Supportive Care:
- Non-comedogenic moisturizer for dryness
- Lip balm for cheilitis (expected side effect)
- Avoid vitamin A supplements
- No blood donation during treatment
- Duration:
- Typically 5-6 months depending on response
- Course may be extended for cumulative dosing
Teaching Points
- Four pathogenic factors of acne: sebum, hyperkeratinization, C. acnes, inflammation
- Isotretinoin addresses all four factors - only acne medication that does so
- iPLEDGE program is mandatory for isotretinoin prescribing
- Monitor pregnancy tests (females), LFTs, and lipids during treatment
- Benzoyl peroxide does not cause bacterial resistance