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J Dent Res Dent Clin Dent Prospects. 2021;15(1): 66-75.
doi: 10.34172/joddd.2021.012
  Abstract View: 12
  PDF Download: 34

Basic Research

Reviews

Ki-67 expression as a diagnostic biomarker in odontogenic cysts and tumors: A systematic review and meta-analysis

Mahnaz Jabbarzadeh 1, Michael R. Hamblin 2* ORCID logo, Fatemeh Pournaghi-Azar 3, Maedeh Vakili Saatloo 4, Maryam Kouhsoltani 1* ORCID logo, Nafiseh Vahed 5

1 Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
2 Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein 2028, South Africa
3 Department of Restorative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
4 Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Urmia University of Medical Sciences, Urmia, Iran
5 Research Center for Evidence-based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran

Abstract


Ki-67 is a marker of cell proliferation, used as an important diagnostic marker in the pathologic differentiation of various lesions. It is also relevant for developing targeted molecular therapies. We carried out a systematic review to assess the Ki-67 labeling index (LI) in odontogenic cysts and tumors. Databases were searched, including PubMed (MEDLINE), Scopus, CINHAL, PsycoInfo, the Cochrane Library, and Proquest. The meta-analysis was carried out based on the data of 608 lesions. When a 5% cut-off point was set, ki-67 LI of all benign odontogenic tumors dropped below this point. All the malignant tumors demonstrated an LI of over 15.3%; a significantly higher Ki-67 LI in malignant odontogenic lesions (17.59 ± 2.80) was observed. Among benign tumors, the largest and the smallest Ki-67 LIs were seen in ameloblastoma (4.39 ± 0.47) and adenomatoid odontogenic tumor (0.91 ± 1.71). The mean values of Ki-67 LI in tumors and cysts were 4.23 (0.38) and 1.04 (0.07), respectively. Among odontogenic cysts, the highest Ki-67 LI was found in odontogenic keratocyst (OKC) (3.58 ± 0.51), and the lowest in the radicular cyst (1.29 ± 0.62%). Ki-67 LIs in all odontogenic cysts were <3%, except for OKC. This controversial lesion seems to have a profile more similar to a tumor, and a treatment plan similar to tumors might be suggested. We found that odontogenic lesions have diverse proliferative activities that help differentiate between various lesions and suggest therapeutic plans.
Keywords: Biomarker, Ki-67 labeling index, Odontogenic Cysts, Odontogenic Tumor
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Abstract View: 12

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Submitted: 28 Jun 2020
Revision: 01 Jul 2020
Accepted: 30 Aug 2020
ePublished: 29 Jan 2021
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