1
|
Li Y, Bae HI, Kim HS, Kang MS, Gong BH, Jung WH, Lee S, Bae JS, Kim KH, Song SW, Lee JH, Kang BH. Spontaneous Peripheral Ameloblastic Odontoma in a Male Sprague-Dawley Rat. Toxicol Res 2017; 33:141-147. [PMID: 28503263 PMCID: PMC5426507 DOI: 10.5487/tr.2017.33.2.141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 02/02/2017] [Accepted: 02/21/2017] [Indexed: 11/20/2022] Open
Abstract
Peripheral ameloblastic odontoma is a rare variant of odontogenic tumor occurring in the extraosseous region. The present report describes a spontaneous tumor in male Sprague-Dawley (SD) rats. The clinically confirmed nodule in the right mandibular region was first observed when the rat was 42 weeks and remained until the terminal sacrifice date when the animal was 48 weeks of age. At necropsy, a well demarcated nodule, approximately 2.5 × 2.0 × 2.0 cm, protruded from the ventral area of the right mandible. The nodule was not attached to mandibular bone and was not continuous with the normal teeth. Histopathologically, the tumor was characterized by the simultaneous occurrence of an ameloblastomatous component and composite odontoma-like elements within the same tumor. The epithelial portion formed islands or cords resembling the follicle or plexiform pattern typical of ameloblastoma and was surrounded by mesenchymal tissue. Formation of eosinophilic and basophilic hard tissue matrix (dentin and enamel) resembling odontoma was observed in the center of the tumor. Mitotic figures were rare, and areas of cystic degeneration were present. Immunohistochemically, the epithelial component was positive for cytokeratin AE1/AE3 (CK AE1/AE3), and the mesenchymal component and odontoblast-like cells were positive for vimentin, in the same manner as in normal teeth. On the basis of these findings, the tumor was diagnosed as a peripheral ameloblastic odontoma in an extraosseous mandibular region in a SD rat. In the present study, we report the uncommon spontaneous peripheral ameloblastic odontoma in the SD rat. We also discuss here the morphological characteristics, origin, histochemical, and immunohistochemical features for the diagnosis of this tumor.
Collapse
Affiliation(s)
- Yinghua Li
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Han-Ik Bae
- Department of Pathology, Kyungpook National University Medical Center, Daegu, Korea
| | - Hak-Soo Kim
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Min-Soo Kang
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Bo-Ho Gong
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Won-Hee Jung
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Sranna Lee
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Jin-Sook Bae
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Kap-Ho Kim
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Si-Whan Song
- Department of Pathology, Chemon Inc., Yongin, Korea
| | - Jae-Hyun Lee
- Department of Pathology, Chemon Inc., Yongin, Korea
| | | |
Collapse
|
2
|
Yuwanati MB, Singh A, Gadbail AR, Mhaske S. Hybrid peripheral ameloblastoma of cheek mucosa. BMJ Case Rep 2013; 2013:bcr-2013-009510. [PMID: 23853015 DOI: 10.1136/bcr-2013-009510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
An unusual case of large buccal tumour has been described. The lesion was clinically compatible with a squamous cell carcinoma, but it had pathological features of an ameloblastoma arising in the soft tissues. Only few cases of extragingival peripheral ameloblastoma were found in a review of the literature. Possible origins of these tumours are still debatable.
Collapse
|
3
|
Peripheral ameloblastoma: a case report and review of literature. Case Rep Dent 2012; 2012:571509. [PMID: 22570798 PMCID: PMC3335587 DOI: 10.1155/2012/571509] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Accepted: 02/19/2012] [Indexed: 11/18/2022] Open
Abstract
Peripheral ameloblastoma, a rare and unusual variant of odontogenic tumour, comprises about 2–10% of all ameloblastomas. The extraosseous location is the peculiar feature of this type of tumour, which is otherwise similar to the classical ameloblastoma. This paper describes a case of peripheral ameloblastoma in a 67-year-old female affecting the lingual alveolar mucosa of the mandibular 32–34 region which was clinically diagnosed as pyogenic granuloma. This paper becomes important due to availability of all data, makeing it a well-documented case.
Collapse
|