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Sachin C Sarode, Gargi S Sarode, Rahul Anand, Shankargouda Patil, Hemant Unadkat
BACKGROUND: The aim of the present study was to find out the efficacy of WhatsApp application for obtaining second opinion on histopathological diagnosis in oral pathology practice. METHODS: A total of 247 cases comprising of 34 different oral pathologies were photomicrographed using smartphone cameras through compound microscopes and sent for second opinion diagnosis (SOD) to 20 different oral pathologists using WhatsApp. RESULTS: Out of 4795 (97...
October 22, 2016: Journal of Oral Pathology & Medicine
Zana Agani, Vjosa Hamiti-Krasniqi, Jehona Recica, Mergime Prekazi Loxha, Fisnik Kurshumliu, Aida Rexhepi
BACKGROUND: Ameloblastoma is a benign epithelial odontogenic tumor. It is often aggressive and destructive, with the capacity to attain great size, erode bone and invade adjacent structures. Unicystic ameloblastoma is a rare odontogenic lesion, with clinical, radiographic and gross features of jaw cysts. The lesion histologically shows typical ameloblastomatous epithelium lining part of the cyst cavity with or without and/or mural tumor growth. Unicystic ameloblastoma usually presents in posterior mandibular ramus region, while it is rare and atypical in posterior maxillary region...
October 18, 2016: BMC Research Notes
Muniswamappa Sudhakara, S Puranik Rudrayya, Srineevas S Vanaki, RamanPreet Kaur Bhullar, M S Shivakumar, Mahadevi Hosur
BACKGROUND: Origin of adenomatoid odontogenic tumor (AOT) has long been a controversy, and the issue of it being a neoplasm or hamartoma was a subject of debate for a long time. Earlier it was grouped under a mixed group of odontogenic tumors considering the varying degrees of inductive changes. Recently, the WHO classification states that the presence of hard tissue within AOT was not due to induction but was rather a metaplastically produced mineralization and hence the tumor was reclassified under a group of tumors arising from odontogenic epithelium...
September 2016: Journal of Oral and Maxillofacial Pathology: JOMFP
Shan Li, Adrianus F Konings, Jay R Jr Stauffer
Lake Malaŵi is known for its endemic haplochromine species flock, most notably the rock-dwelling cichlids known as mbuna. The group of mbuna referred to as the Pseudotropheus elongatus species group is currently comprised of Metriaclima spp., Tropheops spp., Cynotilapia spp., and Pseudotropheus spp. In this study, Chindongo, a new genus with the type species C. bellicosus, is described for additional species in this group. Chindongo is distinguished from other mbuna genera by 1) the presence of bicuspid teeth in the anterior portion of the outer row of both upper and lower jaw; 2) a moderately to steeply sloped vomer with a narrow rostral tip which makes an angle of between 53° and 68° with the parasphenoid; 3) a small mouth with the lower jaw slightly shorter than the upper; 4) a broad anterior dentigerous area on both premaxilla and dentary with three or more rows of teeth (usually 5-6 rows); 5) a flank melanin pattern consisting of vertical bars without horizontal elements at any stage of development...
September 15, 2016: Zootaxa
Hamed Mortazavi, Maryam Baharvand
This review article aimed to introduce a category of jaw lesions associated with impacted tooth. General search engines and specialized databases such as Google Scholar, PubMed, PubMed Central, MedLine Plus, Science Direct, Scopus, and well-recognized textbooks were used to find relevant studies using keywords such as "jaw lesion", "jaw disease", "impacted tooth", and "unerupted tooth". More than 250 articles were found, of which approximately 80 were broadly relevant to the topic. We ultimately included 47 articles that were closely related to the topic of interest...
September 2016: Imaging Science in Dentistry
Vikas Parshottam Bhakhar, Vandana Sandip Shah, Mohsin Jiva Ghanchi, Sandesh Sachchidanand Gosavi, Himanshu Mahesh Srivastava, Nivedita Javahir Pachore
INTRODUCTION: Odontogenic cysts viz Odontogenic Keratocyst (OKC), Dentigerous Cyst (DC) and Radicular Cyst (RC) occur commonly in the oral and maxillofacial region. Cytokeratin (CK) expression studies have been done to evaluate diagnostic accuracy, role in pathogenesis, elucidate behaviour and role in treatment protocols. However, variations have been reported in the expression of CK patterns in these odontogenic cysts, which could be due to the lack of standardization of laboratory techniques...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
Andrew W Barrett, Kenneth J Sneddon, John V Tighe, Aakshay Gulati, Laurence Newman, Jeremy Collyer, Paul M Norris, Darryl M Coombes, Michael J Shelley, Brian S Bisase, Rachael D Liebmann
Aim To determine how many ameloblastomas were misdiagnosed as dentigerous cysts (DCs) by correlating the radiological and histopathological features of a series of both entities. Methods and results Histopathology reports and radiological imaging of 135 DCs and 43 ameloblastomas were reviewed. Any clinical or radiological feature that suggested that the diagnosis of DC was wrong-for example, absence of an unerupted tooth-prompted review of the original histology. A total of 34 cases coded as DC at diagnosis were excluded; in the remaining 101 patients, the clinicoradiological and histopathological features were consistent with DC in 96 (95...
September 12, 2016: International Journal of Surgical Pathology
Roxana G Spini, Lucas Bordino, Daniel Cruz, María de Los Ángeles Fitz Maurice, Andrea Martins, Julian Michalski
Maxillary cysts are a diverse group of entities that include benign and malignant odontogenic tumors. Information on the prevalence of this disease is limited. It is more common among males, and usually occurs in the second and third decade of life. The proportion of 6 to 7 year old patients with dentigerous cysts is only 9.1%. Dentigerous cysts encompass the crown of a permanent and unerupted impacted teeth. They are usually slow growing asymptomatic lesions that are not discovered until they affect surrounding organs...
October 1, 2016: Archivos Argentinos de Pediatría
Deepa Syamala, Rakesh Suresh, Mahija Janardhanan, Vindhya Savithri, Prem P Anand, Amrutha Jose
CONTEXT: Myofibroblasts are fibroblasts with smooth muscle-like features characterized by the presence of a contractile apparatus and found in the connective tissue stroma of normal tissues such as blood vessels and lymph nodes. They are now thought to play a role in the synthesis and reorganization of extracellular matrix, which could contribute to the aggressive biologic behavior of the lesions. AIMS: To compare the mean number of stromal myofibroblasts in dentigerous cysts (DCs), keratocystic odontogenic tumor (KCOT) and ameloblastoma; and to derive a correlation between the stromal myofibroblasts and the known biologic behavior of the lesions...
May 2016: Journal of Oral and Maxillofacial Pathology: JOMFP
P V Deepthi, V T Beena, S K Padmakumar, R Rajeev, R Sivakumar
CONTEXT: A study on odontogenic cysts and tumors. AIMS: The aim of this study is to determine the frequency of odontogenic cysts and tumors and their distribution according to age, gender, site and histopathologic types of those reported over a period of 1998-2012 in a Tertiary Health Care Center at South Kerala. SETTINGS AND DESIGN: The archives of Department of Oral Pathology and Microbiology, were retrospectively analyzed. SUBJECTS AND METHODS: Archival records were reviewed and all the cases of odontogenic cysts and tumors were retrieved from 1998 to 2012...
May 2016: Journal of Oral and Maxillofacial Pathology: JOMFP
Amanda Almeida Leite, Maria Eduarda Pérez de Oliveira, Carla Isabelly Rodrigues Fernandes, Danyel Elias da Cruz Perez
No abstract text is available yet for this article.
August 2016: Journal of the Korean Association of Oral and Maxillofacial Surgeons
Adina Simona Coşarcă, Simona Liliana Mocan, Mariana Păcurar, Emőke Fülöp, Alina Ormenişan
UNLABELLED: The aim of this study is to analyze the immunoexpression of Ki67, p53, MCM3 and PCNA markers in epithelial remnants of dental follicles of impacted teeth and to identify a possible correlation between the immunoexpression of these markers in dentigerous cysts and keratocystic odontogenic tumors in order to evaluate their evolutionary behavior. MATERIALS AND METHODS: A total of 102 cases were included in the study and divided into three subgroups: the first subgroup consisted of 62 cases with dental follicles of impacted teeth, the second included 20 cases of dentigerous cysts and the third subgroup comprised a number of 20 cases with keratocystic odontogenic tumors...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
Rajesh B Dhirawani, Sanyog Pathak, K Mallikaarjuna, Ankit Sharma
Adenomatoid odontogenic tumor (AOT) is a slowly growing benign tumor of the oral cavity. It accounts of 3-7% of all odontogenic tumors. It is seen to occur commonly in the anterior maxilla. The tumor is usually associated with an impacted tooth with maxillary canine being the most common tooth. AOT is seen in a younger group, especially below 20 years with a female preponderance. AOT occurs in two main variants: Central or intraosseous which is more common and second is peripheral which is rare. Radiologically, it represents as a radiolucent lesion with radiopaque foci usually an impacted or a supernumerary tooth...
July 2016: Journal of the Indian Society of Pedodontics and Preventive Dentistry
Evie Satheesan, Sandhya Tamgadge, Avinash Tamgadge, Sudhir Bhalerao, Treville Periera
INTRODUCTION: In the WHO classification of odontogenic tumours, hard tissue formation has been considered as a sub-classification however, this parameter has not been much explored in dental follicle in literature. Epithelial-mesenchymal interactions play an important role in odontogenesis and its associated pathologies; therefore research on dental follicle should also include mesenchymal components along with epithelial components. Additionally, special stains to identify the nature of such depositions in dental follicle have been less explored...
May 2016: Journal of Clinical and Diagnostic Research: JCDR
Azadeh Andisheh-Tadbir, Ali Gorgizadeh
BACKGROUND: CD166 is a glycoprotein of an immunoglobulin super family of adhesion molecules that has been associated with aggressive characteristics and high recurrence rate of tumors. Different odontogenic lesions exhibit considerable histological variation and different clinical behavior. In an attempt to clarify the mechanisms underlying this different behavior, the present study investigates the immunohistochemical expression of CD166 in these lesions. MATERIAL AND METHODS: In this study 69 formalin-fixed, paraffin embedded tissue blocks of odontogenic lesion consist of 15 unicystic ameloblastoma (UA), 17 solid ameloblastoma (SA), 18 keratocystic odontogenic tumors (KCOT), and 19 dentigerous cysts (DC) were reviewed by immunohistochemistry for CD166 staining...
July 2016: Journal of Clinical and Experimental Dentistry
Gustavo A González-Durán
I describe a new species of a small-sized frog of the genus Pristimantis found in the paramo ecosystem (3700 masl) on the northern slope of Los Nevados National Park, Cordillera Central, department of Caldas, Colombia. This new species is assigned to the Pristimantis leptolophus species-group, given that Toe V is much longer than Toe III and extends to the distal edge of the distal subarticular tubercle on Toe IV. The new species differs from other taxa by its dorsal golden or yellowish color patterns, the absence of nuptial pads, lateral fringes on its fingers and toes, and the absence of vomerine odontophores...
2016: Zootaxa
Mojgan Alaeddini, Nosratollah Eshghyar, Shahroo Etemad-Moghadam
BACKGROUND: The number of studies investigating the immunohistochemical characteristics of glandular odontogenic cysts (GOCs) is limited, due to its rarity. TGF-beta has been suggested to induce podoplanin expression in some lesions. We aimed to evaluate and compare podoplanin and TGF-beta expression in GOC and other odontogenic cystic lesions. METHODS: A total of 43 samples including five GOCs, 10 dentigerous cysts (DCs), eight unicystic ameloblastoma (UAs), and 20 radicular cysts (RCs) were selected and subjected to immunohistochemical staining using monoclonal antibodies against podoplanin and TGF-beta...
July 8, 2016: Journal of Oral Pathology & Medicine
Hwan Jun Choi, Jun Beom Lee
Dentigerous cyst (DC), also known as follicular cyst, is an odontogenic cyst with fluid accumulation between the crown and enamel organ of an unerupted tooth, pushing the crown away from the alveolar bone. The patients with DC in the maxillary sinus should be evaluated thoroughly by extraoral and intraoral examinations, proper diagnostic imaging procedures, and pathologic examination to avoid misdiagnosis of maxillary sinusitis. The standard treatment for DC in the maxillary sinus is often removed by Caldwell-Luc approach...
July 2016: Journal of Craniofacial Surgery
Seung-Min Shin, Eun Joo Choi, Seong-Yong Moon
OBJECTIVE: Prevalence of cysts and tumors related to impacted third molars has been considered important because the risk justifies prophylactic extraction. This retrospective study aimed to evaluate the prevalence of cysts or tumors associated with impacted mandibular third molars (IMTMs) according to patients' age and gender. METHODS: Over the period from August 2006 to August 2011, 20,802 third molars from 17,535 patients were removed. Among these, IMTMs without cysts nor tumors were classified as non-pathology group, and IMTMs with cysts and tumors were classified into pathology group...
2016: SpringerPlus
Yu-Hsueh Wu, Julia Yu-Fong Chang, Chih-Huang Tseng, Chun-Pin Chiang, Yi-Ping Wang
BACKGROUND: Benign epithelial odontogenic tumors such as ameloblastoma and keratocystic odontogenic tumor (KCOT) may exhibit an aggressive clinical course reminiscent of malignancies. Recent studies have indicated that astrocyte elevated gene-1 (AEG-1) is highly expressed in a variety of malignant neoplasms and its overexpression is associated with tumor invasion, metastasis, and poor survival. However, the role of AEG-1 in odontogenic tumors and cysts is still undiscovered. METHODS: Immunohistochemical staining of AEG-1 was performed in 42 cases of ameloblastoma, 29 cases of KCOT, and 19 cases of dentigerous cyst...
July 6, 2016: Journal of Oral Pathology & Medicine
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