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Image Number 952 (Lichen planus)


Diagnosis: Lichen planus

Site: Back

Sex: M

Age: 59

Type: Clinical

Description: Purplish papules on the back

Submitted by: Nameer Al-Sudany

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Differential Diagnosis


The precise cause of lichen planus is unknown, but the disease seems to be mediated immunologically. Typical lesions are violaceous, intensely itchy, flat-topped papules. White asymptomatic lacy lines, dots, and occasionally small white plaques, are also found in the mouth, particularly inside the cheeks, in about 50% of patients Scalp lesions can cause a patchy scarring alopecia. This man presented with classical lesions of LP involving mainly the trunk, scalp and oral mucous membrane mainly the inside surface of the cheeks of about 6 months duration.


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