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Stojanov IJ, Ho D, Huss J, Gopalakrishnan R, Yoest JM, Koutlas IG. An Unusual Gingival (Peripheral) Tumor with Features of Keratoameloblastoma with Cytologic Atypia or Possible Malignant Transformation Exhibiting ARID1A Mutation. Head Neck Pathol 2023; 17:808-814. [PMID: 37195520 PMCID: PMC10514248 DOI: 10.1007/s12105-023-01549-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/23/2023] [Indexed: 05/18/2023]
Abstract
BACKGROUND Keratoameloblastoma is a poorly characterized and rarely reported odontogenic neoplasm that can exhibit overlapping histopathologic features with conventional ameloblastoma and keratocystic odontogenic tumor (KCOT), with an ambiguous relationship to the so-called solid KCOT. METHODS A peripheral maxillary tumor causing bone saucerization in a 54-year-old male is described and investigated with immunohistochemistry and Next-Generation Sequencing (NGS). RESULTS Microscopically, the tumor comprised of a predominantly plexiform proliferation of odontogenic epithelium with central keratinization and evidence of surface origin. Peripheral cells exhibited nuclear palisading with variable reverse polarization, while stellate reticulum-like areas were observed internally. A few follicles and a few foci in the lining of cystic spaces revealed increased cellularity with cells exhibiting small but conspicuous nucleoli, focal nuclear hyperchromatism, and a few mitoses mostly seen in the peripheral outer cell layer. Nuclear staining for ki-67 was increased in those areas when compared with the other cystic, follicular, and plexiform areas. These features were interpreted as cytologic atypia suggesting also the possibility of a malignant process. Immunohistochemically, the tumor was positive for CK19 and negative for BRAF VE1, calretinin, and CD56. Ber-Ep4 was only focally positive. By sequencing, an ARID1A c.6527_6538delAG frameshift mutation (VAF: 5.8%), classified as likely oncogenic, and an FBXW7 c.1627 A > G missense mutation (VAF: 8.0%), classified as a variant of uncertain significance, were detected. Two mutations, probably germline (VAF ~ 50%), were recorded for RNF43 and FBXW7. No pathogenic variants were identified in PTCH1, BRAF, NRAS, HRAS, KRAS, FGFR2, or SMO genes. CONCLUSION The significance of an ARID1A variant in keratoameloblastoma is uncertain since this variant has not been reported in ameloblastoma or KCOT, to date. Alternatively, it may characterize malignant transformation in the present case since ARID1A mutations have been encountered in various cancers. Sequencing of additional cases is necessary to determine whether this may represent a recurrent genomic event.
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Affiliation(s)
- Ivan J Stojanov
- Department of Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Dan Ho
- School of Dentistry, University of Minnesota, Minneapolis, MN, USA
| | - Joseph Huss
- Associated Oral and Maxillofacial Surgeons, PA, Maple Grove, MN, USA
| | - Rajaram Gopalakrishnan
- Division of Oral and Maxillofacial Pathology, School of Dentistry, University of Minnesota, 515 Delaware Street SE #16-116B, Minneapolis, MN, 55455, USA
| | - Jennifer M Yoest
- Department of Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Ioannis G Koutlas
- Division of Oral and Maxillofacial Pathology, School of Dentistry, University of Minnesota, 515 Delaware Street SE #16-116B, Minneapolis, MN, 55455, USA.
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2
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Imase R, Watanabe T. Maxillary unicystic ameloblastoma: a rare presentation. BMJ Case Rep 2022; 15:e250786. [PMID: 36414335 PMCID: PMC9685194 DOI: 10.1136/bcr-2022-250786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Unicystic ameloblastoma (UAM), a rare variant of ameloblastoma, is an odontogenic epithelial neoplasm typically appearing in the mandible. We report an extremely rare case of maxillary UAM with an impacted canine and supernumerary tooth. The patient was a woman in her late 30s who presented with a slight expansion of the left anterior maxilla due to a cystic lesion with impacted teeth. Under a clinical diagnosis of dentigerous cyst, the cystic lesion was completely enucleated by extracting the impacted teeth. Based on the clinical features and pathological findings, the final diagnosis was intraluminal UAM in the anterior maxilla. In the present case, despite the rarity of UAM with impacted teeth in the anterior maxilla, it should be considered during differential diagnosis. Careful clinical examination is required for diagnostic accuracy since the clinical findings of tooth-containing ameloblastoma and dentigerous cyst are very similar.
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Affiliation(s)
- Ryo Imase
- Department of Oral and Maxillofacial Surgery, Uwajima City Hospital, Uwajima, Japan
| | - Takuma Watanabe
- Department of Oral and Maxillofacial Surgery, Kyoto University, Kyoto, Japan
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3
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Mendez LD, Wolsefer NS, Asa SL, Wasman J, Yoest JM, Stojanov IJ. The diagnostic utility of BRAF VE1 mutation-specific immunohistochemistry in ameloblastoma. Mod Pathol 2022; 35:1570-1577. [PMID: 35676332 DOI: 10.1038/s41379-022-01105-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 05/06/2022] [Accepted: 05/06/2022] [Indexed: 11/09/2022]
Abstract
Ameloblastoma is a benign, locally aggressive odontogenic neoplasm with variable solid and cystic morphology. On account of its histologic variety, diagnostically challenging cases can bear resemblance to odontogenic keratocyst/keratocystic odontogenic tumor (KCOT) or dentigerous cyst (DC). BRAFV600E mutation has been reported to be specific for and frequent in ameloblastoma, and this study evaluated the usefulness of immunohistochemistry (IHC) using the BRAF VE1 mutant-specific antibody as a diagnostic adjunct in this setting. We investigated 46 ameloblastomas, 30 KCOTs, and 30 DCs. BRAF VE1 IHC was performed on all cases and allele-specific polymerase chain reaction (AS-PCR) for BRAFV600E mutation was performed on 30 ameloblastomas and any IHC-positive KCOT/DC. BRAF VE1 IHC was positive in 31/37 (83.8%) mandibular ameloblastomas but not in any maxillary ameloblastomas (0/9), KCOT (0/30), or DC (0/30). Equivocal staining was seen in 1/37 (3.3%) mandibular ameloblastomas. Of the 30 ameloblastomas subjected to AS-PCR, BRAFV600E mutation was identified in 19/23 (82.6%) mandibular ameloblastomas and 0/7 (0.0%) maxillary ameloblastomas. BRAFV600E mutant ameloblastomas were positive by IHC in 18/19 (94.7%) cases and equivocal in 1/19 (5.3%) cases. All 11 (100.0%) BRAF-wild type ameloblastomas were negative by IHC. BRAF VE1 is an excellent tool for the diagnosis of mandibular ameloblastoma but of limited utility in the maxilla, where it less commonly occurs and where BRAFV600E mutation is considerably less frequent.
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Affiliation(s)
- Luvy D Mendez
- Department of Pathology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Nicholas S Wolsefer
- Department of Oral and Maxillofacial Medicine, Case Western Reserve University School of Dental Medicine, Cleveland, OH, USA
| | - Sylvia L Asa
- Department of Pathology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Jay Wasman
- Department of Pathology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Jennifer M Yoest
- Department of Pathology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Ivan J Stojanov
- Department of Pathology, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA. .,Department of Oral and Maxillofacial Medicine, Case Western Reserve University School of Dental Medicine, Cleveland, OH, USA.
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Evangelou Z, Zarachi A, Dumollard JM, Peoc'h M, Komnos I, Kastanioudakis I, Karpathiou G. Maxillary Ameloblastoma: A Review With Clinical, Histological and Prognostic Data of a Rare Tumor. In Vivo 2021; 34:2249-2258. [PMID: 32871747 DOI: 10.21873/invivo.12035] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/07/2020] [Accepted: 07/09/2020] [Indexed: 01/05/2023]
Abstract
Diagnosis of odontogenic tumors can be challenging due to their rarity and diverse morphology, but when arising near the tooth, the diagnosis could be suspected. When their location is not typical, like inside the paranasal sinuses, the diagnosis is less easy. Maxillary ameloblastomas are exceedingly rare with only sparse information on their epidemiological, histological and genetic characteristics. The aim of this report is to thoroughly review the available literature in order to present the characteristics of this tumor. According to available data, maxillary ameloblastomas can occur in all ages but later than mandible ones, and everywhere within the maxillary region without necessarily having direct contact with the teeth. No sex preference has been shown. The most common histological patterns seen in this location are the follicular and plexiform ones. Maxillary ameloblastomas are locally aggressive neoplasms, thus therapy aims for excision including normal bone beyond the lesion. In contrast to mandible ameloblastomas, maxillary ones most commonly show mutations of the SMO gene. Furthermore, differential tumor diagnosis is thoroughly discussed in the present review.
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Affiliation(s)
- Zoi Evangelou
- Department of Pathology and Otorhinolaryngology, University Hospital of Ioannina, Ioannina, Greece
| | - Athina Zarachi
- Department of Head and Neck Surgery, University Hospital of Ioannina, Ioannina, Greece
| | - Jean Marc Dumollard
- Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Michel Peoc'h
- Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Ioannis Komnos
- Department of Head and Neck Surgery, University Hospital of Ioannina, Ioannina, Greece
| | | | - Georgia Karpathiou
- Department of Pathology and Otorhinolaryngology, University Hospital of Ioannina, Ioannina, Greece .,Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
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Kaouani A, Kerdoud O, Aloua R, Slimani F. Mandibular unicystic ameloblastoma revealed by florid epulis of the gum: Case report. Ann Med Surg (Lond) 2021; 66:102422. [PMID: 34136210 PMCID: PMC8178072 DOI: 10.1016/j.amsu.2021.102422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 05/16/2021] [Accepted: 05/22/2021] [Indexed: 11/28/2022] Open
Abstract
Ameloblastomas are quite frequent odontogenic tumors, they can be intraosseous or peripheral to the gum, it's rare to find an intraosseous ameloblastoma with gingival extension. Here, we report the case of a 40 years old woman who presented with an exophytic gingival lesion at the gum level of the 46 tooth that was extracted at a quack 01 years before her consultation due to pain in this area. Clinical and radiological examination revealed the presence of two tumors in the same area. The patient benefited from an excision of her gingival tumor and an enucleation of her intraosseous tumor. Histopathological and immunohistochemical examinations revealed that the respective tumors were a spindle cell epulis and an intraluminal unicystic ameloblastoma of different origins, leaving the question and search for the relationship between these two tumors. The postoperative course was uneventful during the 12-month follow-up period after surgical treatment.
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Affiliation(s)
- Amine Kaouani
- Department of Stomatology and Maxillofacial Surgery, 20 August 1953 Hospital, Ibn Rochd, B.P, 2698, Casablanca, Morocco
| | - Ouassime Kerdoud
- Department of Stomatology and Maxillofacial Surgery, 20 August 1953 Hospital, Ibn Rochd, B.P, 2698, Casablanca, Morocco
| | - Rachid Aloua
- Department of Stomatology and Maxillofacial Surgery, 20 August 1953 Hospital, Ibn Rochd, B.P, 2698, Casablanca, Morocco
| | - Faical Slimani
- Department of Stomatology and Maxillofacial Surgery, 20 August 1953 Hospital, Ibn Rochd, B.P, 2698, Casablanca, Morocco
- Faculty of Medicine and Pharmacy of Casablanca, Hassan II University of Casablanca, B.P, 5696, Casablanca, Morocco
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The immunohistochemical profile of basal cell nevus syndrome-associated and sporadic odontogenic keratocysts: a systematic review and meta-analysis. Clin Oral Investig 2021; 25:3351-3367. [PMID: 33730212 DOI: 10.1007/s00784-021-03877-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 03/08/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To provide a systematic review of the literature on studies comparing the immunoprofile of nevoid basal cell carcinoma syndrome (BCNS)-associated and sporadic odontogenic keratocysts (OKCs), in order to identify markers that could accurately distinguish the two OKC subtypes. MATERIALS AND METHODS We searched MEDLINE/Pubmed, Web of Science, EMBASE via OVID, and grey literature for publications until December 28th, 2019, that compared the immunohistochemical expression of the two OKC subtypes. The studies were qualitatively assessed using the Critical Appraisal Tool for Case Series (Joana Briggs Institute). Sensitivity and specificity, positive and negative likelihood ratio, diagnostic odds ratio and area under the curve, and pooled estimates were calculated, using a random-effects model. RESULTS Seventy-one studies were qualitatively analyzed; 61 markers were evaluated in one study and 32 in ≥ 2 studies. Twenty-five studies reported differential expression of 29 markers in the form of higher number of positive cells or greater staining intensity usually in BCNS-associated OKCs. Meta-analysis for bcl-2, Cyclin D1, CD56, CK18, p53, and PCNA showed that none of those markers is distinguishable between BCNS-associated and sporadic OKCs, in a 95% confidence interval. The risk of bias was high in 34 studies, moderate in 22, and low in 15. CONCLUSIONS The present systematic review and meta-analysis uncovered that, although several immunohistochemical markers might characterize the OKC phenotype, they cannot discriminate between the BCNS-associated and sporadic OKCs. CLINICAL RELEVANCE This study highlighted the requirement for additional screening for markers by immunohistochemistry, preferentially coupled to alternative diagnostic applications such as genomics technologies.
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Varshney A, Aggarwal S, Gill SK, Aggarwal A, Jaiswal Y, Sharma J. Comparison of calretinin expression in dentigerous cysts and ameloblastoma: An immunohistochemical study. Natl J Maxillofac Surg 2020; 11:224-230. [PMID: 33897185 PMCID: PMC8051659 DOI: 10.4103/njms.njms_71_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 01/17/2020] [Accepted: 04/28/2020] [Indexed: 12/16/2022] Open
Abstract
Background: Calretinin is a calcium-binding protein of 29-kilodalton (kDa), which is widely expressed in normal human tissues and tumorigenic tissues. Its expression in the odontogenic epithelium during odontogenesis and in neoplastic odontogenic tissues has been demonstrated. Unicystic ameloblastoma poses a diagnostic challenge, as its histologic presentation can be sometimes mistaken for cystic odontogenic lesions. In the present study, an attempt is made to overcome the confusion encountered in the diagnosis of dentigerous cyst and unicystic ameloblastoma, using the expression of calretinin in both lesions and to compare this expression with conventional ameloblastoma to accurately diagnose and differentiate these lesions. Materials and Methods: A total of eighty cases, in which twenty cases each of ameloblastoma, unicystic ameloblastoma, dentigerous cyst, and odontogenic keratocyst (OKC) were included in the study. Slides were made from the archival blocks of each case and were stained immunohistochemically with calretinin. Results: Correlation between calretinin staining and histopathological diagnosis was done, and it was found that all twenty cases of ameloblastoma showed positivity for calretinin, whereas 17 of twenty cases of unicystic ameloblastoma showed positivity for calretinin staining. All the cases of OKC and dentigerous cyst were negative for calretinin. Conclusion: Calretinin may serve as an important diagnostic adjunct in the differential diagnosis of ameloblastoma and cystic odontogenic lesions.
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Affiliation(s)
- Anchal Varshney
- Department of Oral Pathology and Microbiology, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Shivani Aggarwal
- Department of Oral Pathology and Microbiology, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Sharanjeet Kaur Gill
- Department of Oral Pathology and Microbiology, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Ashim Aggarwal
- Department of Oral and Maxillofacial Surgery, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Yashmi Jaiswal
- Senior Consultant, Ahead Dental Clinic, New Delhi, India
| | - Jaishree Sharma
- Department of Oral Pathology and Microbiology, Manav Rachna Dental College, Faridabad, Haryana, India
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8
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Costes Martineau V. [ENT benign lesions and pseudo-tumors: Case No. 2]. Ann Pathol 2018; 38:269-273. [PMID: 30126763 DOI: 10.1016/j.annpat.2018.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 07/20/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Valérie Costes Martineau
- Département de biopathologie, centre hospitalier universitaire de Montpellier, 191, avenue du Doyen-Gaston-Giraud, 34295 Montpellier cedex 5, France.
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10
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Immunohistochemical expression of CD56 in dog (Canis familiaris) odontogenesis. Arch Oral Biol 2015; 60:1577-80. [PMID: 26276269 DOI: 10.1016/j.archoralbio.2015.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 07/30/2015] [Accepted: 08/02/2015] [Indexed: 01/13/2023]
Abstract
AIM To investigate the expression of CD56 in dog odontogenesis in order to elucidate the expression found in ameloblastomas. MATERIALS AND METHODS Immunohistochemical analysis of CD56 expression of developing dog teeth in the bud, cap and bell stages including the remnants of the dental lamina. RESULTS Weak CD56 expression was observed in the dental epithelium during the bud stage with intense staining of certain peripheral epithelial cells. Positive staining of epithelial cells was also observed in the cap stage with intense staining of the inner enamel epithelium at this stage. During the bell stage the staining was concentrated on the cervical loop areas. The dental papilla revealed positive staining throughout the cap and bell stages while the dental follicle stained intensely positive throughout all the phases examined. The dental lamina and Serres rests also stained positive for CD56. CONCLUSIONS The expression of CD56 in dog odontogenic tissue varies according to the stage of tooth development. There is a positive correlation between the positive staining observed in ameloblastomas and their odontogenic cells of origin.
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Vera-Sirera B, Forner-Navarro L, Vera-Sempere F. NCAM (CD56) expression in keratin-producing odontogenic cysts: aberrant expression in KCOT. Head Face Med 2015; 11:3. [PMID: 25889612 PMCID: PMC4337090 DOI: 10.1186/s13005-015-0060-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/20/2015] [Indexed: 01/09/2023] Open
Abstract
Objective To investigate immunohistochemically the expression of neural cell adhesion molecule (NCAM), which has been identified as a signaling receptor with frequent reactivity in ameloblastomas (AB), in a series of keratin-producing odontogenic cysts (KPOCs). Material and methods Immunohistochemical expression of NCAM, using a monoclonal antibody, was determined in a series of 58 KPOCs comprising 12 orthokeratinized odontogenic cysts (OOCs) and 46 keratocystic odontogenic tumors (KCOTs), corresponding to 40 non-syndromic KCOT (NS-KCOTs) and 6 syndromic KCOT (S-KCOTs), associated with nevic basocellular syndrome (NBCS). Results NCAM expression was negative in all OOCs, but 36.45% of KCOTs exhibited focal and heterogeneous expression at the basal cell level, as well as in basal budding areas and the basal cells of daughter cysts. The latter two locations were especially applicable to S-KCOTs, with focal NCAM reactivity occurring in 66.66% of cases. Conclusions Aberrant NCAM expression, in KCOTs but especially in S-KCOTs, together with its immunomorphological location, suggests that this adhesion molecule and signaling receptor plays a role in the pathogenesis of KCOTs, with a probable impact on lesional recurrence. Electronic supplementary material The online version of this article (doi:10.1186/s13005-015-0060-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | - Francisco Vera-Sempere
- Departaments of Pathology, University of Valencia, Valencia, Spain. .,Service of Pathology, Hospital Universitario y Politécnico La Fe, Avda Campanar 21, Valencia, 46009, Spain.
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Jaafari-Ashkavandi Z, Dehghani-Nazhvani A, Razmjouyi F. CD56 Expression in Odontogenic Cysts and Tumors. J Dent Res Dent Clin Dent Prospects 2014; 8:240-5. [PMID: 25587387 PMCID: PMC4288915 DOI: 10.5681/joddd.2014.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 06/25/2014] [Indexed: 12/28/2022] Open
Abstract
Background and aims. Odontogenic cysts and tumors have a wide spectrum of clinical characteristics that lead to the different management strategies. Since definite diagnosis is difficult in some cases, it has been suggested that CD56 may be a candidate marker for definitive diagnosis of some odontogenic tumors. The present study was designed to examine CD56 expression in lesions with histopathological similarities. Materials and methods. In this cross-sectional, analytical study the subjects were 22 ameloblastomas, 13 dentigerous cysts, 10 keratocystic odontogenic tumors (KCOT), 4 adenomatoid odontogenic tumors (AOT), 3 orthokeratinized odonto-genic cysts, 3 calcifying odontogenic cysts (COC) and one glandular odontogenic cyst (GOC). All the samples were examined for CD56 immunoreactivity. Data were analyzed using chi-square test. Results. Twenty cases (91%) of ameloblastomas, 3 (75%) AOT, 4 (40%) KCOT and one case of GOC were positive for CD56. None of the dentigerous cysts, COC and orthokeratinized odontogenic cysts was CD56-positive. There was a significant difference in the CD56 expression between ameloblastoma and dentigerous cyst, as well as COC. Also, KCOT showed significantly higher expression than orthokeratinized odontogenic cyst. Conclusion. In this study CD56 expression was limited to the odontogenic tumors and more aggressive cystic lesions. This marker can be a useful aid for distinguishing cysts and tumors from similar lesions.
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Affiliation(s)
- Zohreh Jaafari-Ashkavandi
- Associate Professor, Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ali Dehghani-Nazhvani
- Assistant Professor, Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Faranak Razmjouyi
- Postgraduate Student, Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Hunter KD, Speight PM. The diagnostic usefulness of immunohistochemistry for odontogenic lesions. Head Neck Pathol 2014; 8:392-9. [PMID: 25409846 PMCID: PMC4245415 DOI: 10.1007/s12105-014-0582-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 10/30/2014] [Indexed: 10/24/2022]
Abstract
The diagnosis of odontogenic tumors can be challenging, largely due to their rarity and consequent difficulties in gaining experience in their assessment. In most cases, careful attention to morphology, in conjunction with clinical and radiological features will allow a diagnosis to be made. However, in some cases, immunohistochemical analysis of the tumor may be useful. In this review we will outline the immunohistochemical expression profile of normal developing odontogenic tissues and a range of odontogenic tumors. In many cases the immunohistochemical markers are neither specific nor sensitive enough to be of help in diagnosis, but in some cases such analysis may prove very useful. Thus we have outlined a limited number of circumstances where immunohistochemistry may be of use to the practicing diagnostic pathologist.
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Affiliation(s)
- Keith D. Hunter
- grid.11835.3e0000000419369262Unit of Oral and Maxillofacial Pathology, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield, S10 2TA UK
| | - Paul M. Speight
- grid.11835.3e0000000419369262Unit of Oral and Maxillofacial Pathology, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield, S10 2TA UK
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14
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Costes V. [Oral and stomatological pathology. Case 2: unicystic ameloblastoma with a plexiform tumoral contingent]. Ann Pathol 2014; 34:197-201. [PMID: 24950866 DOI: 10.1016/j.annpat.2014.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Accepted: 03/24/2014] [Indexed: 11/18/2022]
Affiliation(s)
- Valérie Costes
- Département de biopathologie, CHU de Montpellier, 34250 Montpellier cedex 5, France.
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15
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Lei Y, Jaradat JM, Owosho A, Adebiyi KE, Lybrand KS, Neville BW, Müller S, Bilodeau EA. Evaluation of SOX2 as a potential marker for ameloblastic carcinoma. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 117:608-616.e1. [DOI: 10.1016/j.oooo.2014.01.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/05/2014] [Accepted: 01/09/2014] [Indexed: 12/20/2022]
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González-González R, Molina-Frechero N, Damian-Matsumura P, Bologna-Molina R. Molecular markers of cell adhesion in ameloblastomas. An update. Med Oral Patol Oral Cir Bucal 2014; 19:e8-e14. [PMID: 23986011 PMCID: PMC3909437 DOI: 10.4317/medoral.19071] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Accepted: 05/19/2013] [Indexed: 02/07/2023] Open
Abstract
Ameloblastoma is the most common odontogenic tumor of epithelial origin, and though it is of a benign nature, it frequently infiltrates the bone, has a high rate of recurrence and could potentially become malignant. Cellular adhesion potentially plays an important role in the manifestation of these characteristics and in the tumor biology of ameloblastomas. Losses of cell-cell and extracellular matrix adhesion and cohesion are among the first events that occur in the invasion and growth of tumors of epithelial origin. The present review includes a description of the molecules that are involved in cell adhesion as reported for various types of ameloblastomas and discusses the possible roles of these molecules in the biological behaviors of this odontogenic tumor. Knowledge of the complex mechanisms in which these molecules play a role is critical for the research and discovery of future therapeutic targets.
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Affiliation(s)
- Rogelio González-González
- Research Department, School of Dentistry, Universidad Juárez del Estado de Durango (UJED), Predio Canoas S n, 34000 Durango, México,
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Unicystic ameloblastoma presenting in Gardner's syndrome. Head Neck Pathol 2013; 8:239-40. [PMID: 23943067 PMCID: PMC4022926 DOI: 10.1007/s12105-013-0484-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 07/29/2013] [Indexed: 10/26/2022]
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[Atypical presentation of an odontogenic tumor: a case report]. Ann Pathol 2013; 33:288-92. [PMID: 23954126 DOI: 10.1016/j.annpat.2013.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 04/22/2013] [Accepted: 06/04/2013] [Indexed: 11/20/2022]
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Herwig MC, Fischer HP, Moore CE, Walsh MD, Olson JJ, Beitler JJ, Grossniklaus HE. [Orbital invasion of a maxillary ameloblastoma]. Ophthalmologe 2012; 110:251-4. [PMID: 22752627 DOI: 10.1007/s00347-012-2622-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A 66-year-old man with a history of repeated surgery, external radiation and brachytherapy for ameloblastoma presented with a recurrence of the tumor with sinus, intraorbital and skull base infiltration. Histopathologic examination of the resected orbital and sinus tissue confirmed the diagnosis of ameloblastoma. Immunohistochemical staining for CD56 was strongly positive in the tumor cells. Although ameloblastoma is usually a low-grade malignant tumor, it can be locally aggressive with invasion of the surrounding tissue. Maxillary ameloblastomas are more likely to infiltrate the orbit.
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Affiliation(s)
- M C Herwig
- Universitäts-Augenklinik Bonn, Ernst-Abbe-Str. 2, 53127, Bonn, Deutschland.
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