Abstract
Ameloblastomas are a group of benign, locally aggressive, recurrent tumors characterized by their slow and infiltrative growth. E-Cadherin and syndecan-1 are cell adhesion molecules related to the behavior of various tumors, including ameloblastomas. Ninety-nine ameloblastoma samples were studied; the expression of E-cadherin and syndecan-1 were evaluated by immunohistochemistry. E-Cadherin and epithelial syndecan-1 were more highly expressed in intraluminal/luminal unicystic ameloblastoma than in mural unicystic ameloblastoma and solid/multicystic ameloblastoma, whereas the stromal expression of syndecan-1 was higher in mural unicystic ameloblastoma and solid/multicystic ameloblastoma. Synchronicity was observed between E-cadherin and epithelial syndecan-1; the expression was correlated with intensity in all cases. There was a strong association between expression and tumor size and recurrence. The evaluation of the expression of E-cadherin and syndecan-1 are important for determining the potential aggressiveness of ameloblastoma variants. Future studies are required to understand how the expression of these markers is related to tumor aggressiveness.
Highlights
The ameloblastoma is an epithelial neoplasia originating in the enamel and has been described as a tumor that is usually unicentric, intermittent in growth, and persistent [1]
According to the recent classification by the World Health Organization (WHO) [2], ameloblastoma is defined as a benign epithelial odontogenic neoplasia, characterized by tumor expansion, progressive growth, and a tendency for recurrence if not completely removed
UAM is characterized by slow growth that occurs as a single cystic cavity, in which different types of epithelial extension can occur, namely, luminal, intraluminal (UAM-L/I), and mural (UAM-M)
Summary
The ameloblastoma is an epithelial neoplasia originating in the enamel and has been described as a tumor that is usually unicentric, intermittent in growth, and persistent [1]. According to the recent classification by the World Health Organization (WHO) [2], ameloblastoma is defined as a benign epithelial odontogenic neoplasia, characterized by tumor expansion, progressive growth, and a tendency for recurrence if not completely removed. SMA has two common types of histopathological growth patterns that are not related to prognosis [2]. UAM is characterized by slow growth that occurs as a single cystic cavity, in which different types of epithelial extension can occur, namely, luminal, intraluminal (UAM-L/I), and mural (UAM-M). The mural component displays aggressive behavior, like that observed in SMA [2]
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