II. Epidemiology
- Onset Age 5 months to 5 years
III. Pathophysiology
- Unilateral distribution following Blaschko Lines
- Developmental pathways of epidermal cell migration and proliferation in the fetus
- Unclear cause
- Possible Triggers
- Viral Infection
- Autoimmune Conditions
- Pregnancy
- Environmental factors
IV. Findings
- Unilateral Linear Dermatitis along Blaschko Lines (see pathophysiology above)
- Typically affects extremities (rarely on Fingernails)
- May affect trunk
- Asymptomatic flesh-colored, flat topped Papules
- Lesions may be pruritic
- Erythematous Papules may be more difficult to visualize in darker skin
- Course
- Skin lesions may persist for 1-2 years
- Possible longer-standing skin pigmentation changes
V. Differential Diagnosis
VI. Labs
- Clinical diagnosis (does not require biopsy)
- Biopsy findings (if performed)
- Lymphocytic inflammatory infiltrate of Macrophages and Lymphocytes
- Surrounds Eccrine Glands, Hair Follicles, vessels
VII. Management
- No treatment needed
- Mild Pruritus may be treated symptomatically
- Topical skin Emollients
- Low potency Topical Corticosteroids (7-10 days)
- Reassurance that lesions are benign and resolve spontaneously after 1-2 years without treatment
- Chronic skin pigmentation changes may persist
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Related Studies
| Concepts | Disease or Syndrome (T047) |
| ICD10 | L44.2 |
| SnomedCT | 42442001 |
| Dutch | lichen striatus, lichen; striatus, striatus; lichen, Lichen striatus |
| French | Lichen striatus |
| German | Lichen striatus |
| Italian | Lichen striatus |
| Portuguese | Lichen striatus |
| Spanish | Liquen estriado, liquen estriado (trastorno), liquen estriado |
| Japanese | ｾﾝｼﾞｮｳﾀｲｾﾝ, 線状苔癬 |
| English | lichen striatus (diagnosis), lichen striatus, lichens striatus, lichen striata, Lichen striatus, Lichen striata, Lichen striatus (disorder), lichen; striatus, striatus; lichen, Lichen, striata |
| Czech | Lichen striatus |
| Korean | 선상태선 |
| Hungarian | Lichen striatus |
