General
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• Adult women during pregnancy or neonates
• Due to hormone induced hyperplasia of loose subepithelial connective tissue or end stage of granulation tissue

Micro description
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• Central fibrovascular core covered by normal appearing squamous epithelium
• Stroma may be edematous, hypocellular
• May have atypical stromal cells

Positive stains
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• Desmin, vimentin

Negative stains
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• Actin

Differential diagnosis
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• Botyroid rhabdomyosarcoma: cambium layer, epithelial invasion, rapid growth, cross striations

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