Histopathlogic Spectrum of Lichen Striatus

Area of Science:

• Dermatopathology
• Histopathology of Inflammatory Skin Conditions

Background:

• Lichen striatus is a rare, acquired skin condition characterized by papules and plaques arranged linearly.
• Understanding the histopathologic features of lichen striatus is crucial for accurate diagnosis and management.

Purpose of the Study:

• To classify the histopathologic changes observed in skin biopsies of patients with classical lichen striatus.
• To determine the prevalence of different histopathologic patterns in lichen striatus.

Main Methods:

• Skin lesions from 49 patients with classical lichen striatus were biopsied.
• Histopathologic examination of the biopsy specimens was performed.
• Changes were classified into distinct dermatopathologic patterns.

Main Results:

• The most common histopathologic pattern observed was perivascular dermatitis (51%).
• Perivascular and periappendageal dermatitis (26.5%) and lichenoid dermatitis (22.5%) were also identified.
• Three specimens additionally showed islands of epithelioid cells.

Conclusions:

• Perivascular dermatitis is the predominant histopathologic finding in classical lichen striatus.
• The histopathologic spectrum of lichen striatus includes perivascular, periappendageal, and lichenoid patterns.
• These findings contribute to the histopathologic characterization of lichen striatus.