Focal Fibrous Hyperplasia

• 44% of cases.
• Dense collagenous tissue, with ulceration/superficial inflammation
• Dystrophic calcificaition within the fibrous connective tissue stroma (often highly cellular, with 'young stellate fibroblasts'
• No odontogenic epithelium seen.
• Occasional strands of surface epithelium growing down into the stroma.
• Most of these were previously diagnosed as fibromatous or ossifying epulides.

With thanks to Andrew Jefferies (Cambridge) and Alun Williams (RVC) for providing access to their lecture materials