A Case of Unilateral Linear Pattern Porokeratosis of Mibelli
ZHANG Hongwei
ZHANG Xian
Abstract：To report a case of unilateral linear pattern porokeratosis of Mibelli.A 46-year-old man presented with a rash on the left upper chest,scapular region,and upper limb for nearly 40 years.Physical examination revealed ring-like and map-shaped brown plaques that were sharply demarcated and distributed in long strips on his left arm.Parts of the plaques had fused together,and the edge of the plaques was ridge-like.The central part showed mild atrophy and keratin plugs the size of pinheads.Skin lesions extended to the upper chest and scapular region.On the back of the hand and the extensor surface of the fingers,the skin lesions exhibited lichenoid and verruciform changes.Histopathological examination of the edge of the annular lesion revealed hyperkeratosis of the surrounding uplifted area,forming a concave depression filled with keratin.In the central depression,an incomplete column of keratinization(a cone-shaped multilamellar structure)was observed.Based on the clinical presentation and histopathology,the diagnosis was made as unilateral linear pattern porokeratosis of Mibelli.Oral acitretin treatment was initiated.
Keywords：PorokeratosisCase report
Publication Date：2024-11-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：2( 1800-1801 )