General
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• Rare
• Chronic hyperproliferative plaque or mass that clinically resembles malignancy
• In vulva or perianal region

Case reports
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• Patient with large fungated vulvar mass (Case of the Week #53)
• 44 year old African American man with a hypertrophic gluteal cleft plaque (J Drugs Dermatol 2003;2:198)

Treatment
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• Often ineffective, often recurs

Gross images
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Vulvar mass

Micro description
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• Epithelial hyperplasia, brisk infiltrate of lymphocytes and plasma cells

Micro images
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Vulvar mass

HSV immunostain

Positive stains
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• HSV

Additional references
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• Dis Colon Rectum 2005;48:2289

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