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https://www.readbyqxmd.com/read/29791200/evaluation-of-mandibular-odontogenic-keratocyst-and-ameloblastoma-by-panoramic-radiograph-and-computed-tomography
#1
Daniel Berretta Moreira Alves, Fabrício Mesquita Tuji, Fábio Abreu Alves, André Caroli Rocha, Alan Roger Dos Santos-Silva, Pablo Agustin Vargas, Márcio Ajudarte Lopes
OBJECTIVE: The purpose of this study was to describe and compare the main imagenological features of mandibular ameloblastomas and odontogenic keratocyst (OKC) using panoramic radiograph (PR) and computed tomography (CT). METHODS: The sample consisted of 9 cases of ameloblastomas and 9 cases of OKC. PR and CT images were analyzed according to shape, internal structure, borders, associated unerupted tooth, root resorption, expansion and perforation of cortical bones...
May 23, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29731577/expression-of-ki-67-in-odontogenic-cysts-a-comparative-study-between-odontogenic-keratocysts-radicular-cysts-and-dentigerous-cysts
#2
Tapan G Modi, Monali Chalishazar, Malay Kumar
Introduction and Objectives: Odontogenic cysts are the most common cysts of the jaws and are formed from the remnants of the odontogenic apparatus. Among these odontogenic cysts, radicular cysts (RCs) (about 60% of all diagnosed jaw cysts), dentigerous cysts (DCs) (16.6% of all jaw cysts) and odontogenic keratocysts (OKCs) (11.2% of all developmental odontogenic cysts) are the most common. The behavior of any lesion is generally reflected by its growth potential. Growth potential is determined by measuring the cell proliferative activity...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29706474/a-series-of-240-odontogenic-keratocysts-should-we-continue-to-use-the-terminology-of-keratocystic-odontogenic-tumour-for-the-solid-variant-of-odontogenic-keratocyst
#3
Devrim Kahraman, Omer Gunhan, Bulent Celasun
Most of the odontogenic keratocysts show an indolent behaviour like non-neoplastic lesions. For this reason, the odontogenic keratocyst was reclassified within the odontogenic cysts category in the WHO 2017 classification. Some odontogenic keratocysts may contain satellite cysts or solid squamoid islands within their wall. Recently, a solid form of odontogenic keratocyst has also been described which is composed entirely of multiple epithelial islands and small cysts in a collagenous stroma. The true nature of this variant is unclear yet...
April 11, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29672163/an-unusual-case-of-an-odontogenic-keratocyst-associated-with-an-ungrafted-alveolar-cleft-a-case-report-and-review-of-the-literature
#4
Sapna Radia, Alexander C Cash, Kanwalraj Moar
We describe an unusual case of an odontogenic keratocyst (OKC) associated with an ungrafted left-sided alveolar cleft in a 10-year-old male patient. There is no previous report in the literature of OKC or other dental cysts associated with an alveolar cleft. We discuss the management of the OKC prior to secondary bone grafting and present this case to highlight the difficulty in the management of OKC concurrent with grafting of the alveolar cleft site, the proximity of unerupted permanent teeth, and possible treatment modalities...
January 1, 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29657523/comparison-of-osteoclastogenesis-and-local-invasiveness-of-ameloblastoma-and-keratocystic-odontogenic-tumor
#5
Natheer H Al-Rawi, Ammar K Al-Siraj, Ahlam H Majeed
Objectives: The aim of this study was to compare the expression of receptor-activated nuclear factor kappa B (RANK) with its ligand (RANKL) and matrix metalloproteinase-2 (MMP2) in solid/multicystic ameloblastomas (ABs) and keratocystic odontogenic tumors (KOTs). Materials and Methods: The expression of MMP2, RANK, and RANKL molecules was evaluated in 13 ABs and 14 KOTs by immunohistochemistry. The expressions were calculated in the odontogenic epithelial cells as well as the stromal cells...
January 2018: European Journal of Dentistry
https://www.readbyqxmd.com/read/29621081/odontogenic-keratocysts-as-first-manifestation-of-nevoid-basal-cell-carcinoma-syndrome-surgical-management-and-immunohistochemical-analysis
#6
Jessica Luana Dos Santos, Renata Zoraida Rizental Delgado, Greison Rabelo de Oliveira, Ana Lúcia Carrinho Ayroza Rangel
Nevoid Basal Cell Carcinoma Syndrome (NBCCS), also known as Gorlin syndrome, is a rare autosomal dominant disorder, with no gender predilection. Individuals with NBCCS are commonly diagnosed between 17 and 35 years old and can present multiple basal cell carcinomas scattered throughout the body, presence of recurrent and early-onset odontogenic keratocysts (OKCs) and skeletal abnormalities. This article describes a case of a 13-year-old white boy who referred complaining of facial asymmetry. Extraoral examination revealed volumetric increase displacing the nasal ala from the right side and extended to the zygomatic bone...
April 4, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29620170/increased-level-of-cell-derived-microparticles-in-the-cyst-fluids-of-odontogenic-keratocysts
#7
Qi-Wen Man, Wen-Qun Zhong, Jian-Gang Ren, Jin-Yuan Liu, Yue-Yu Zheng, Rui-Fang Li, B Fidele Nyimi, Gang Chen, Yi-Fang Zhao, Bing Liu
The aim of this study was to examine the level and basic characteristics of cell‑derived microparticles (MPs) in the cyst fluids of odontogenic keratocysts (OKCs). For this purpose, MPs from the cyst fluids (CFMPs) of OKCs were purified by a classic differential centrifugation method and characterized by a transmission electron microscope and fluorescence microscope. Flow cytometric analysis was used to determine the size, concentration and cellular origins of the CFMPs. Moreover, the expression level of receptor activator for nuclear factor‑κB ligand in the OKCs was evaluated by immunohistochemical staining and then analyzed for its correlation with the concentration of CFMPs by Spearman's rank correlation test...
April 5, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29577431/is-podoplanin-expression-associated-with-tgf-%C3%AE-signaling-in-odontogenic-cysts-and-tumors
#8
Shahroo Etemad-Moghadam, Mojgan Alaeddini
BACKGROUND: Induction of podoplanin by TGF-β has been shown in a number of lesions but not in odontogenic tumors (OTs). We evaluated the association between these markers in OTs for the first time and compared their expression among the different neoplasms. METHODS: Immunohistochemistry using monoclonal antibody against podoplanin and TGF-β was performed on 76 odontogenic cysts and tumors. Spearman's correlation coefficient, Kruskal-Wallis and Mann-Whitney-U tests followed by adjustment with Bonferroni were used for statistical analysis (P<0...
March 26, 2018: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/29575684/new-mutations-and-an-updated-database-for-the-patched-1-ptch1-gene
#9
Marie G Reinders, Antonius F van Hout, Betûl Cosgun, Aimée D Paulussen, Edward M Leter, Peter M Steijlen, Klara Mosterd, Michel van Geel, Johan J Gille
BACKGROUND: Basal cell nevus syndrome (BCNS) is an autosomal dominant disorder characterized by multiple basal cell carcinomas (BCCs), maxillary keratocysts, and cerebral calcifications. BCNS most commonly is caused by a germline mutation in the patched-1 (PTCH1) gene. PTCH1 mutations are also described in patients with holoprosencephaly. METHODS: We have established a locus-specific database for the PTCH1 gene using the Leiden Open Variation Database (LOVD). We included 117 new PTCH1 variations, in addition to 331 previously published unique PTCH1 mutations...
March 25, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29564556/immunohistochemical-evaluation-of-sonic-hedgehog-signaling-pathway-proteins-shh-ptch1-ptch2-smo-gli1-gli2-and-gli3-in-sporadic-and-syndromic-odontogenic-keratocysts
#10
Ana Maria Hoyos Cadavid, E Kaminagakura, M F S D Rodrigues, C A L Pinto, T H N Teshima, F A Alves
AIMS: The aim of this study was to compare the clinical and demographic features of 62 patients presenting sporadic odontogenic keratocysts (OKCs) or OKCs associated with nevoid basal cell carcinoma syndrome (NBCCS). In conjunction with this, we also evaluated the immunohistochemical expression of Shh, Ptch1, Ptch2, Smo, Gli1, Gli2 and Gli3 proteins in 86 OKCs. By doing this, we add to the understanding of the biology of this type of lesion, providing tools that will help facilitate the early diagnosis of NBCCS in those patients where the first manifestation is that of OKCs...
March 21, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29544218/a-novel-ptch1-frameshift-mutation-leading-to-nevoid-basal-cell-carcinoma-syndrome
#11
Ceren D Durmaz, Gareth Evans, Miriam J Smith, Pelin Ertop, Bengü N Akay, Timur Tuncalı
Nevoid basal cell carcinoma syndrome (NBCCS), also known as Gorlin syndrome, is a rare multisystemic autosomal dominant disorder typically presenting with cutaneous basal cell carcinomas, multiple keratocysts, and skeletal anomalies. NBCCS is caused by heterozygous mutations in the PTCH1 gene in chromosome 9q22, in the PTCH2 gene in 1p34, or the SUFU gene in 10q24.32. Here, we report on an 18-month-old boy presenting with medulloblastoma, frontal bossing, and multiple skeletal anomalies and his father who has basal cell carcinomas, palmar pits, macrocephaly, bifid ribs, calcification of falx cerebri, and a history of surgery for odontogenic keratocyst...
2018: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/29543044/the-use-of-dual-nasal-trumpet-stents-to-decompress-keratocystic-odontogenic-tumours
#12
S Al-Benna, T G Arayathinal
No abstract text is available yet for this article.
March 15, 2018: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29530737/clinical-characteristics-and-immunohistochemical-analysis-of-p53-ki-67-and-cyclin-d1-in-80-odontogenic-keratocysts
#13
C Doll, K Dauter, K Jöhrens, S Hartwig, J O Voss, M Klein, M Heiland, J-D Raguse
OBJECTIVE: The aim of this study was to evaluate clinical parameters and expression patterns of Ki-67, cyclin D1 and p53 in odontogenic keratocysts. MATERIAL AND METHODS: In this study, fifty-three patients with 80 odontogenic keratocysts were included. The medical records of these patients were reviewed retrospectively. To elucidate the molecular pathogenesis of the disease, the expression of p53, Ki-67 and cyclin D1 was analyzed using immunohistochemistry. RESULTS: A total of 53 patients (mean age 38 years) with a median follow-up of 4...
March 9, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29521748/delayed-diagnosis-of-gorlin-goltz-syndrome-the-importance-of-the-multidisciplinary-approach
#14
Jéssica Araújo Figueira, Fábio Roberto de Souza Batista, Karina Rosso, Vanessa Cristina Veltrini, Angelo José Pavan
Gorlin-Goltz syndrome (GGS), also known as nevoid basal cell carcinoma syndrome, is an autosomal dominant inherited disorder with high penetrance and variable expressivity. The classic triad originally described by Gorlin and Goltz in 1960 is composed of multiple nevoid basal cell carcinomas (NBCCs), odontogenic keratocysts (OKCs) in the jaws and bifid ribs. in 1977, this triad was modified by Rayner et al, and to GGS diagnosis, the OKCs had to appear in combination with calcification of the cerebellar falx or palmar and plantar pits...
March 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29508125/investigation-of-clinicopathological-parameters-and-expression-of-cox-2-bcl-2-pcna-and-p53-in-primary-and-recurrent-sporadic-odontogenic-keratocysts
#15
Tomasz Kaczmarzyk, Konrad Kisielowski, Rafał Koszowski, Magdalena Rynkiewicz, Ewa Gawełek, Karolina Babiuch, Anna Bednarczyk, Bogna Drozdzowska
OBJECTIVES: Odontogenic keratocyst (OKC) presents considerable variation in aggressiveness and propensity for recurrence, yet hitherto, no explicit clinicopathological features have been determined to clearly demonstrate the potential for relapse. This retrospective study aims to investigate the prognostic relevance of various clinicopathological features as well as immunoexpression of COX-2, bcl-2, PCNA, and p53 in sporadic OKC. MATERIALS AND METHODS: Among 41 patients with OKC treated by enucleation, the frequency of recurrence for various clinicopathological features as well as immunoexpression for COX-2, bcl-2, PCNA, and p53 was evaluated...
March 5, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29498494/potential-hot-spot-for-de-novo-mutations-in-ptch1-gene-in-gorlin-syndrome-patients-a-case-report-of-twins-from-croatia
#16
Vesna Musani, Petar Ozretić, Diana Trnski, Maja Sabol, Sanja Poduje, Mateja Tošić, Mirna Šitum, Sonja Levanat
We describe a case of twins with sporadic Gorlin syndrome. Both twins had common Gorlin syndrome features including calcification of the falx cerebri, multiple jaw keratocysts, and multiple basal cell carcinomas, but with different expressivity. One brother also had benign testicular mesothelioma. We propose this tumor type as a possible new feature of Gorlin syndrome. Gorlin syndrome is a rare autosomal dominant disorder characterized by both developmental abnormalities and cancer predisposition, with variable expression of various developmental abnormalities and different types of tumors...
February 28, 2018: Croatian Medical Journal
https://www.readbyqxmd.com/read/29491624/trigeminal-neuralgia-induced-by-odontogenic-keratocyst-associated-with-impacted-supernumerary-teeth-a-rare-case-report
#17
Annaji Araleri Gopalkrishna, B N Tejasree, M Manjunath, D P Ashwin
Odontogenic keratocyst(OKC)is a cyst oftooth origin with an aggressive behavior including a high recurrence rate, it has been rechristened to keratocystic odontogenic tumor(KCOT) as it be the reflects its neoplastic nature. We report a case of KCOT in association with an impacted supernumerary tooth along with Trigeminal Neuralgia, that subsided by itself after removal of the cyst.
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29491599/orthokeratinized-odontogenic-cyst-with-calcification-a-rare-case-report-of-a-distinct-entity
#18
Mamata Kamat, Sampada Kanitkar, Uma Datar, Sanjay Byakodi
Orthokeratinized odontogenic cyst (OOC) is a relatively rare odontogenic cyst, distinct from odontogenic keratocyst (OKC). In the 4th edition of WHO Classification of Head and Neck Tumors (2017), OOC has been included as a separate entity in the category of developmental odontogenic cysts. It presents as a unilocular radiolucent lesion in the posterior mandible and is frequently related to impacted teeth, thus mimicking dentigerous cyst. Due to low local aggressiveness and no association with nevoid basal cell carcinoma syndrome, it does not show tendency to recur...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29476674/apoptosis-and-cell-cycle-aberrations-in-epithelial-odontogenic-lesions-an-evidence-by-the-expression-of-p53-bcl-2-and-bax
#19
J-R Tenório, T Santana, S-I-M-L Queiroz, D-H-I-P de Oliveira, L-M-G Queiroz
BACKGROUND: Ameloblastoma (AMB), odontogenic keratocyst (OKC) and adenomatoid odontogenic tumor (AOT) are epithelial odontogenic lesions with diverse biologic profiles. Defects in regulation of apoptosis and cell cycle may be involved in the development and progression of those lesions, therefore we aimed to investigate the expression of Bcl-2, Bax and p53 to better understand the possible role of these proteins in AMBs, OKCs and AOTs. MATERIAL AND METHODS: The studied sample consisted of 20 AMBs, 20 OKCs and 20 AOTs...
March 1, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29472118/loss-of-heterozygosity-of-mir15a-mir16-1-negative-regulators-of-the-antiapoptotic-gene-bcl2-is-not-common-in-odontogenic-keratocysts
#20
Taynara Asevedo Campos de Resende, Vanessa de Fátima Bernardes, Jéssica Carolina da Silva, Luiz Armando De Marco, Ricardo Santiago Gomez, Carolina Cavalieri Gomes, Marina Gonçalves Diniz
OBJECTIVES: The odontogenic keratocyst (OKC) is an aggressive odontogenic cyst that has a high recurrence rate. Apart from PTCH1 mutations, few molecular alterations are described in OKCs. Low expression of microRNAs (miRNAs) miR-15a and/or miR-16-1 in association with increased expression of their target, Bcl-2, have been previously found in OKC. In humans, MIR15A and MIR16-1 are clustered at chromosome position 13 q14, and loss of heterozygosity (LOH) at this locus occurs in different tumors...
April 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
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