Overview
Lichen simplex chronicus is a localized, thickened skin condition characterized by chronic irritation and scratching leading to lichenified plaques, often seen in areas of repetitive trauma or pruritus 1.Diagnosis
Histopathological features include hyperkeratosis, acanthosis, and elongation of rete ridges 1.
Giant cells (Montgomery giant cells) may occasionally be observed in dermis biopsies 1.
Clinical presentation involves well-demarcated, thickened, and often intensely pruritic skin lesions 2.Management
First-line treatments:
- Topical corticosteroids to reduce inflammation and itching 3.
- Avoidance of scratching and irritants 3.
Adjunctive treatments:
- Occasional surgical excision, though recurrence is possible 2.
- Psychological support for managing chronic itch 3.Special Populations
Lithium-treated patients: Pruritic lesions may develop and resolve with lithium discontinuation; topical steroids can manage symptoms while maintaining lithium therapy 3.Key Recommendations
Use topical corticosteroids for symptomatic relief and to manage inflammation in lichen simplex chronicus (Evidence: Moderate 3).
Consider surgical excision as a treatment option, acknowledging potential for recurrence 2 (Evidence: Weak).
Evaluate and address underlying causes, such as medication side effects (e.g., lithium), especially in patients with recurrent or atypical presentations (Evidence: Expert opinion).References
1 Rubakovic S, Steffen C. Dermatopathology in historical perspective: the Montgomery giant cell of lichen simplex chronicus. Skinmed 2010. link
2 Dean EA, Bernhard JD. Recurrence of lichen simplex chronicus after surgical excision. Cutis 1987. link
3 Shukla S, Mukherjee S. Lichen simplex chronicus during lithium treatment. The American journal of psychiatry 1984. link