A spontaneous ameloblastic fibroma was found in a 9-week-old guinea pig. Histopathologically, neoplastic cells consisted of two components: an odontogenic epithelium and odontogenic mesenchyme. The odontogenic epithelium formed strands, nests and islands that were interspersed within the odontogenic mesenchyme. In the marginal region, odontoblasts and scant dysplastic eosinophilic material were...

Odontogenic fibroma (OF) is considered an unusual, benign mesenchymal neoplasm and one of the most little-understood lesions amongst all odontogenic neoplasms. The incidence rate of the tumor is from 0% to 5.5%. WHO classified them into intraosseous or central and extraosseous or peripheral variants. It chiefly consists of fibroblastic tissue with an inconsistent amount of inactive appearing od...

Primary intraosseous squamous cell carcinoma (PIOSCC) is a rare type of odontogenic carcinoma arising from the jawbone. Odontogenic cysts are true cysts that arise from the dental epithelium, which is associated with tooth formation. The epithelial lining of odontogenic cysts has the potential to transform into various types of odontogenic tumor; however, this transformation from an odontogenic...

objective: the ortho keratinized odontogenic cyst (ooc) is a rare lesion originates from dental lamina and clinically, it may be mistaken for many other odontogenic cysts and tumors. microscopically, it should be distinguished from kcot because of differences in biologic behavior and histologic features.   case: an interesting case of ooc arising in the edentulous mandibular right first premola...

AIMS To compare the expression of S100 protein, alpha-smooth muscle actin (alpha-SMA) and keratin 19 in odontogenic myxomas and non-odontogenic myxoid lesions. METHODS Formalin fixed, paraffin wax embedded tissue from seven odontogenic myxomas, three soft tissue myxomas, six hyperplastic myxoid dental follicles, two intramuscular myxomas, 12 cardiac myxomas, and seven normal dental follicles ...

Introduction: Adenomatoid odontogenic tumor since years has been a subject for diligent research by Oral Medicine and Radiologists and Oral Pathologists in the past. Adenomatoid odontogenic tumor is a benign hamartomatous slow growing neoplasm of epithelial origin composed of odontogenic epithelium in a variety of histoarchitectural patterns, embedded in a mature connective tissue stroma and ch...

AIM Though odontogenic lesions have in common origin from the primitive odontogenic epithelium , there is a diversity in their initiation behavior and growth. The aggressive nature of odontogenic keratocyst similar to ameloblastoma in comparision with the other common odontogenic (dentigerous and radicular) cyst could be due to possible differences in their epithelial linings. PCNA (Proliferati...

Adenomatoid odontogenic tumor is a relatively uncommon distinct odontogenic neoplasm. It is an uncommon tumor of odontogenic origin with varying number of ductlike structures and inductive changes in the stroma. It is a benign and slow growing epithelial tumor and represents 3% of all odontogenic tumors. Its occurrence is more common in anterior region of the maxilla than mandible. Most of the ...

The combined epithelial odontogenic tumor is known to be an uncommon lesion characterized by the synchronous presentation of typical histological features of adenomatoid odontogenic tumor, calcifying epithelial odontogenic tumor, or Pindborg tumor. Combination between other types of odontogenic tumors has occasionally been reported in the literature. In this work we report 2 cases of adenomatoi...