Diagramatic representation of two patterns of fibroadenoma

Diagramatic representation of two patterns of fibroadenoma

• Fibrosdenoma consists of proliferating epithelial and mesenchymal components

• Stroma proliferates around tubular ducts (pericanalicular pattern) or compressed cleft like ducts (Intracanalicular pattern)

• Ducts are lined by luminal epithelial cells and outer myoepithelial cells. Luminal epithelial cells may show hyperplasia. Other changes like atrophic change or apocrine change or squamous metaplasia can also occur

• Stroma shows abundant hyalinization and myxoid change.