II. Definition

  1. Vellus Hairs
    1. Non-pigmented fine "peach fuzz" hair covering body
    2. Found in children and adults
  2. Hypertrichosis is an increase in vellus Hair Growth
    1. Not androgen dependent (contrast with Hirsutism)

III. Causes

  1. Medications
    1. See Medication Causes of Hypertrichosis
  2. Underlying disease
    1. Hypothyroidism
    2. Anorexia Nervosa
    3. Dermatomyositis
    4. Epidermolysis Bullosa
    5. Malnutrition
    6. Porphyria
  3. Congenital syndromes
    1. Hurler's Syndrome
    2. Trisomy 18
    3. Fetal Alcohol Syndrome
  4. Normal states
    1. Advanced age
    2. Ethnic background
    3. Pregnancy

IV. Differential Diagnosis

  1. Hirsutism
    1. Excessive androgen-dependent pigmented Hair Growth

V. Management

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