1. Eur Ann Otorhinolaryngol Head Neck Dis. Feb;(1) doi: / Epub Jul 9. A case of an ameloblastic fibrosarcoma in the mandible is described. The primary tumor was seen in a 5-year-old child. In spite of repeated surgical. Introduction. Ameloblastic fibrosarcoma (AFS) is a rare malignant odontogenic tumor. It can arise de novo, however one-third of cases may arise from a recurrent.

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No evidence of regional lymphadenopathy or distant metastasis was found and a segmental resection of the maxilla along with wide excision of the surrounding soft tissues was performed.

All these lesions displayed very similar clinical-demographic and prognostic features.

Ameloblastic fibrosarcoma: a rare malignant odontogenic tumor.

In this study case, for example, marked hyperplasia of ameloblastic-like cells was observed; however, positivity for Ki was found to be less than in the mesenchymal component. For the cases diagnosed as AFS, age ranged widely from 0. Assessment of growth potential by MIB-1 immunohistochemistry in ameloblastic fibroma and related lesions of the jaws compared with ameloblastic fibrosarcoma.

All collected information was considered in the fibrosarccoma survival analysis. Treatment of choice is wide surgical excision, with long-term follow-up.

Descriptive statistics were used to assess the clinicopathological data. C Odontogenic ectomesenchyme showing high pleomorphism, hyperchromatism and mitotic figure arrow.

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However, sometimes, it is seriously difficult to differentiate AFS, especially low-grade tumors from ameloblastic fibroma. Ameloblastic fibrosarcoma of the mandible: As anaplasia is not distributed uniformly throughout the tumor, definitive diagnosis can be made only from surgically removed pieces, as in the present case.


The malignant spindle cell proliferation showed positive staining with p and a high proliferation index with ki Sign up for our Email Newsletters.

To the best ameloblxstic our knowledge, less than documented cases have been reported in the English language literature [ 6 ]. An odontogenic lesion was the clinical impression and an incisional biopsy was performed. Both neoplasms have a biphasic nature; however, AF has no malignant component, unlike AFS in which the mesenchymal component presents marked cellularity, nuclear pleomorphism, hyperchromatism, and a moderate to high number of mitotic figures. It is critical to differentiate AFS, especially low-grade variant, from ameloblastic fibroma, and recently, several immunohistochemical studies with Ki67, Bcl-2, PCNA, c-KIT, and P53 have been performed, suggesting that proliferating markers in association to histopathologic features could be useful for gibrosarcoma the malignant tumor.

A clinicopathologic and DNA analysis of five cases and review of the literature with discussion of its relationship to ameloblastic fibroma.

All analyses were performed using the GraphPad Prism software v. Odontogenic tumors and tumor-like lesions constitute a rare group of heterogeneous diseases that range from nonneoplastic tissue proliferations to malignant tumors with metastatic potential. Immunoexpression of Ki67, proliferative cell nuclear antigen, and Bcl-2 amelblastic in a case of ameloblastic fibrosarcoma. Immunohistochemical study and review of the literature.


J Oral Surg ; A Rationale for Diagnosis and Treatment. Both patients complained of swelling and pain. The majority of reported cases have been found in the posterior region of mandible and rarely maxillary involvement is indicated.

CD34 expressing ameloblastic fibrosarcoma arising in the maxilla: National Center for Biotechnology InformationU. Ameloblastic carcinoma of the maxillaJ Laryngol Otol.

This website is intended for pathologists and laboratory personnel, who understand that medical information is imperfect and must be interpreted fjbrosarcoma reasonable medical judgment.

Rapid sarcomatous transformation of an ameloblastic fibroma of the mandible: All these components are included ameloblastix a highly cellular malignant connective stromal component, with cells showing variable degrees of anaplasia 1. Rare mixed odontogenic tumor that consists of a benign ameloblastic epithelium and a malignant mesenchymal stroma Thought to be malignant counterpart to ameloblastic fibroma.

Ameloblastic fibrosarcoma of the upper jaw: Report of a rare case with long-term follow-up

These alterations have been shown by loss of heterozygosity and immunohistochemistry studies and the present data reinforce such evidences 75 He complained of continuous dull pain in the upper left region of his face from amelolastic months ago and visual disturbances in recent weeks. Jpn J Oral Surg. Ameloblastic sarcoma in the mandible.