Dermatology Book

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Acne Vulgaris

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  1. Epidemiology
    1. Prevalence: 75% of teenagers and young adults
  2. Pathophysiology
    1. See Acne Vulgaris Pathophysiology
    2. Secondary causes
      1. See Hyperandrogenism
      2. Cushing's Disease
      3. Polycystic Ovary Syndrome
      4. Congenital Adrenal Hyperplasia
  3. Classification of Acne Vulgaris
    1. Obstructive Acne
      1. Open Comedones (Black heads)
      2. Closed Comedones (White heads)
    2. Inflammatory Acne (in order of lesion formation)
      1. Papules
      2. Pustules
      3. Nodules
      4. Cysts
      5. Scars
  4. Severe subtypes
    1. Consider in refractory cases
    2. Referral usually indicated
    3. Conditions
      1. Gram Negative Folliculitis
        1. Severe, inflammatory acne
        2. Onset months after starting oral antibiotics
      2. Acne Fulminans
        1. Rapidly progressive, severe inflammatory acne
        2. Associated findings
          1. Fever
          2. Arthralgia
          3. Bone diathesis
      3. Acne conglobata
        1. Severe cystic acne
        2. Associated with dissecting scalp Cellulitis
        3. Associated with Hydradenitis suppurativa
        4. Aggressive treatment required
      4. Pyoderma faciale
        1. Rapidly progressive facial cystic acne (esp cheeks)
        2. May be a variant of Acne Rosacea
        3. Affects adult women
  5. Management
    1. See Acne Vulgaris Management
  6. Resources: Patient Education
    1. Information from your Family Doctor: Acne in Teens
      1. http://www.familydoctor.org/healthfacts/001/
  7. References
    1. Habif (2004) Dermatology, Mosby, p. 162-94
    2. Parker in Noble (2001) Primary Care p. 758-60
    3. Gollnick (2003) J Am Acad Dermatol 49:S1

Acne Vulgaris (C0001144)

Definition (MSH)A chronic disorder of the pilosebaceous apparatus associated with an increase in sebum secretion. It is characterized by open comedones (blackheads), closed comedones (whiteheads), and pustular nodules. The cause is unknown, but heredity and age are predisposing factors.
ConceptsDisease or Syndrome (T047)
ICD9706.1
EnglishAcne, Acne Vulgaris, Common acne
Spanishacné común, acné vulgar, acne comun, acne vulgar
CreditsDerived from the NIH UMLS (Unified Medical Language System)



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