Benign fibrous histiocytoma of the lower lip.

The fibrous histiocytoma is a soft-tissue neoplasm of the biphasic cell population of fibroblasts and histiocytes that affects the dermis and the subcutaneous tissue. The objective of this article is to report a case of benign fibrous histiocytoma (BFH) of the lower lip in a 32-year-old female patient with a chief complaint of swelling in the lower lip for the past 1 month. With diagnostic clinical hypothesis of fibrous hyperplasia, fibrous histiocytoma and mucocele, an excisional biopsy was performed.

Amelogenin in odontogenic cysts and tumors: An immunohistochemical study.

Background: Amelogenins are the major enamel proteins that play a major role in the biomineralization and structural organization of enamel. Aberrations of enamel-related proteins are thought to be involved in oncogenesis of odontogenic epithelium. The expression of amelogenin is possibly an indicator of differentiation of epithelial cells in the odontogenic lesions.