Lichenoid Keratosis

Lichenoid Keratosis (Benign Lichenoid Keratosis)

Overview

A lichenoid keratosis is a benign inflammatory skin lesion that typically develops when the immune system attacks a pre-existing solar lentigo or seborrheic keratosis. It appears as a solitary, pink to violaceous or brown flat patch or thin plaque, often on sun-exposed skin. It is harmless but may be biopsied to rule out other conditions.

Key Symptoms

• Solitary pink, red-brown, or violaceous flat patch or thin plaque
• Typically 3-15 mm in diameter
• May appear scaly or slightly rough on the surface
• Usually asymptomatic, though occasionally mildly itchy
• Occurs on sun-exposed areas, most commonly the trunk and arms
• Often develops at the site of a pre-existing sun spot

Affected Areas

Trunk, Arms, Forearms, Chest, Upper back

Care Instructions

1. No treatment is required since lichenoid keratoses are benign.
2. A biopsy may be performed to confirm the diagnosis and rule out other conditions.
3. The lesion often resolves on its own over weeks to months.
4. Apply daily broad-spectrum SPF 30+ sunscreen to prevent new sun-related lesions.
5. See a dermatologist if the lesion changes, grows, or becomes symptomatic.

Medical Disclaimer: This information is for educational purposes only and does not replace professional medical advice. Always consult a qualified dermatologist for diagnosis and treatment.

Prevalence: Common; frequently encountered in adults with sun-damaged skin