BACKGROUND The aim of the present article is to report a case of ameloblastic carcinoma and use a marker alpha smooth muscle actin as a tool to differentiate cases of ameloblastic carcinoma from that of ameloblastoma. METHODS Case study reporting a case of ameloblastic carcinoma (AC) with expression of alpha smooth muscle actin (alpha-SMA) as a marker for emergence of stromal myofibroblasts. ...

The dilated odontoma is an infrequent developmental alteration that appears in any area of the dental arches and can affect deciduous, permanent and supernumerary tooth. Dens invaginatus is a developmental anomaly resulting from invagination of a portion of crown forming within the enamel organ during odontogenesis. The most extreme form of dens invaginatus is known as dilated odontoma. The aim...

Here is described a case of ameloblastic fibrosarcoma (AFS) affecting the posterior mandible of a woman who was treated surgically and recovered without signs of recurrence or metastasis after 12 years of follow-up. Tumor sections were immunostained for cell cycle, epithelial and mesenchymal markers. Immunohistochemical analysis evidenced high Ki-67 positivity in stromal cells (mean of 20.9 cel...

Ameloblastic fibro-odontosarcoma (AFOS) is an extremely rare subtype of odontogenic sarcoma, with no more than 19 cases reported in the English literature to date. AFOS is a biphasic neoplasm, with deposits of dentin and enamel matrix. We herein present a case of AFOS with active epithelial proliferation in a 31-year-old female patient. The patient was referred to the West China Hospital of Sto...

INTRODUCTION Ameloblastic fibroma (AF) is a rare benign odontogenic tumor that usually occurs in the fi two decades of life. It affects adolescents and young adults and is found in the mandible and with a high frequency in the posterior region of this segment. There are rare case reports with a long-term follow-up. CASE OUTLINE We report the case of a 6-year-old boy with extensive ameloblasti...