Changes

*44% of cases.  

*44% of cases of oral masses.  

*Dense collagenous tissue, with ulceration/superficial inflammation

*Dense collagenous tissue, with ulceration/superficial inflammation

*Dystrophic calcificaition within the fibrous connective tissue stroma (often highly cellular, with 'young stellate fibroblasts'

*Dystrophic calcification within the fibrous connective tissue stroma (often highly cellular, with 'young stellate fibroblasts'

*No odontogenic epithelium seen.  

*No odontogenic epithelium seen.  

*Occasional strands of surface epithelium growing down into the stroma.  

*Occasional strands of surface epithelium growing down into the stroma.