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Keratocystic odontogenic tumor

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https://www.readbyqxmd.com/read/28969743/ortho-keratinized-odontogenic-cyst-with-dentinoid-formation
#1
Manas Bajpai, Nilesh Pardhe, Manika Aroroa, Betina Chandolia
Orthokeratinized odontogenic keratocyst (OOC) was first identified as orthokeratinized variant of odontogenic keratocyst in 1981 by Wright, due to its different histology and relatively low recurrence rate. Parakeratinized odontogenic cyst is now considered as keratocystic odontogenic tumor (KCOT) owing to its neoplastic nature. Although rare, calcification in the form of dystrophic calcification, dentinoid and cartilage has been reported in KCOT, but calcification in OOC is extremely rare and no case in English literature has been reported so far...
September 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28968331/reconstruction-of-mandibular-segmental-detects-using-transport-disk-distraction-osteogenesis
#2
Tao Li, Yi Man, Ruiye Bi, Nan Jiang, Yunfeng Li, Songsong Zhu
BACKGROUND: Distraction osteogenesis (DO) has become an important alternative for bone defect reconstruction. The study aims to investigate the clinical feasibility and efficiency of transport disc DO (TDDO) for reconstruction of segmental defect of mandible and further dental implant treatment. METHODS: A serial of 6 patients diagnosed with ameloblastoma or keratocystic odontogenic tumor were included in this study. Computed tomography (CT) scanning and panoramic radiograph were performed for preoperative evaluation and surgery planning...
September 29, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28931192/markers-of-proliferation-and-cytokeratins-in-the-differential-diagnosis-of-jaw-cysts
#3
Nikola D Živković, Dragan S Mihailović, Miloš S Kostić, Ana S Cvetanović, Žaklina Ž Mijović, Maja V Milentijević, Tijana V Denčić
We conducted a retrospective study to analyze the histologic and immunohistochemical findings in three main types of odontogenic cyst. We studied 90 archived cystic jaw lesions: 30 dentigerous cysts, 30 keratocystic odontogenic tumors, and 30 radicular cysts. The cyst types were identified on the basis of clinical, radiologic, and histopathologic findings. Immunohistochemical analyses included staining with Ki-67, p53, epidermal growth factor receptor (EGFR), cytokeratin (CK) 8, CK14, CK17, and CK18. Cell immunopositivity was evaluated for the entire epithelium...
September 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28910164/botryoid-odontogenic-cyst-exploration-of-proliferative-activity-apoptosis-and-expression-of-tp53-and-bcl2-compared-to-the-histologically-identical-lateral-periodontal-and-gingival-cysts
#4
R S Redman, E Paal, S Chauhan, R Avers, N Bayley
The botryoid odontogenic cyst (BOC) is a rare, locally more aggressive variant of the usually indolent lateral periodontal cyst (LPC) and gingival cyst (GC). A recent case of BOC provided an opportunity for an exploratory study on the causes of its more aggressive behavior. The limited objective was to see if the BOC was sufficiently different from the other cysts to warrant an investment in a large study. Sections of neutral buffered formalin fixed, paraffin-embedded tissues from the BOC and archival specimens of four GCs, four LPCs and three odontogenic keratocysts (OKCs) were stained using immunohistochemistry for Ki-67, a marker of proliferating cells, caspase-3, a marker of cells undergoing apoptosis, tumor suppressor p53, and the apoptosis inhibitor BCL2...
September 14, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28893467/controversies-in-oral-and-maxillofacial-pathology
#5
REVIEW
Zachary S Peacock
Several benign pathologic entities that are commonly encountered by the oral and maxillofacial surgeon remain controversial. From etiology to treatment, no consensus exists in the literature regarding the best treatment of benign lesions, such as the keratocystic odontogenic tumor, giant cell lesion, or ameloblastoma. Given the need for often-morbid treatment to prevent recurrence of these lesions, multiple less-invasive treatments exist in the literature for each entity with little agreement. As the molecular and genomic pathogenesis of these lesions are better understood, directed treatments will hopefully lessen the contention in management...
November 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28862228/a-study-of-the-distribution-of-b-cell-lymphoma-leukemia-2-in-odontogenic-cyst-and-tumors-histochemical-study
#6
Khushboo Phull, Rashmi Metgud, Shrikant Patel
INTRODUCTION: The odontogenic keratocyst is known for its aggressiveness, high recurrence rate, and transformation of keratinized epithelia to nonkeratinized squamous epithelium for which inflammation has been suggested to be responsible. B-cell lymphoma/leukemia-2 (Bcl-2) an anti-apoptotic protein, prolongs the life span of epithelial cells and allows proliferation, differentiation, and morphogenesis. MATERIALS AND METHODS: Study was carried out comprising of 90 cases; (30 ameloblastoma, 30 keratocystic odontogenic tumor (KCOT), and 30 radicular cyst)...
July 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28761280/recurrent-keratocystic-odontogenic-tumor-of-right-maxillary-sinus-involving-the-right-infraorbital-rim
#7
Karthikeyan Maruthamuthu, G Vasupradha, Janardhanam Dineshshankar, Abishek Rajaram Balaji
Keratocystic odontogenic tumor (KCOT) is a benign odontogenic tumor with an aggressive behavior and high recurrence rate. The most common site of predilection is the posterior mandible. In contrast, KCOTs occurring in the maxillary region are relatively rare. However, the maxillary involvement poses a greater and increased threat, due to proximity to vital structures such as maxillary sinus, orbital floor, and infratemporal fossa. This report presents such a case of KCOT involving the maxillary sinus eroding the floor of the orbit and provides an account of the factors that need to be considered during management...
January 2017: National Journal of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713753/removal-of-multiple-keratocystic-odontogenic-tumors-in-a-nonsyndromic-patient
#8
Artur Cunha Vasconcelos, Paulo Henrique de Souza Castro, Alvaro Henrique Borges, Luiz Evaristo Ricci Volpato
Multiple keratocystic odontogenic tumors are one of the key features of Gorlin-Goltz syndrome. A 15-year-old nonsyndromic female child presented with multiple keratocystic odontogenic tumors. The presence of the tumors was observed in immunological examinations. The images led to the suspicion of Gorlin-Goltz syndrome which was discarded after analyzing the patient's medical history and complementary examinations. Le Fort I osteotomy was opted to access the maxillary tumors favoring visibility and allowing simultaneous bilateral accesses...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713736/using-carnoy-s-solution-in-treatment-of-keratocystic-odontogenic-tumor
#9
Najwa Jameel Alchalabi, Ahmed Maki Merza, Sabah Abdulaziz Issa
AIM: The aim of this study was to assess the treatment of keratocystic odontogenic tumor using enucleation and Carnoy's solution with peripheral ostectomy. MATERIALS AND METHODS: Twenty-nine patients (14 females and 15 males) with age range from 12 to 62 years were included in this study and followed up for 7 years; all the patients were treated in the Department of Oral and Maxillofacial Surgery of the Specialized Surgeries Teaching Hospital (Al-Shaheed Ghazi Al-Hariri Hospital-Medical City, Baghdad, Iraq)...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28706783/the-anecdote-of-viral-etiopathogenia-in-ameloblastoma-and-odontogenic-keratocyst-why-don-t-we-let-it-go
#10
Bacem A E O Khalele
BACKGROUND: Ameloblastoma (AM) and odontogenic Keratocyst (OKC) are destructive odontogenic lesions of the gnathion. Although their exact pathogeneses are not yet totally understood, the viral etiopathogenesis in AM and KCOT has been proposed. True to syndromic keratocystic odontogenic tumor (sKCOT) and non-syndromic OKC is the high recurrence rate. OBJECTIVES: Given that shared pathways trailed by AM and by sKCOT/OKC have been suggested, this study, however, contrasts the expression of AM and OKC for viral antibodies...
May 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/28700034/application-of-endoscopy-to-treat-mandibular-keratocystic-odontogenic-tumors
#11
Z Gao, Q W Ni, W Gao, Y P Liu, Q Zhang
The aim of this study was to evaluate the feasibility of endoscopy to remove keratocystic odontogenic tumors (KCOTs) with virtual 3D mandibular images. Fifteen patients (mean age, 40.27±14.58 years) who underwent endoscopic mandibular KCOT enucleation between May 2009 and October 2009 were included. Virtual 3D mandibular reconstructions derived from computed tomography (CT) imaging were generated for all patients. Recurrence and pathological fracture were evaluated as the primary outcome variables at 1 and 12 months after operation...
July 10, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28688493/computer-aided-diagnosis-of-periapical-cyst-and-keratocystic-odontogenic-tumor-on-cone-beam-computed-tomography
#12
E Yilmaz, T Kayikcioglu, S Kayipmaz
BACKGROUND AND OBJECTIVES: In this article, we propose a decision support system for effective classification of dental periapical cyst and keratocystic odontogenic tumor (KCOT) lesions obtained via cone beam computed tomography (CBCT). CBCT has been effectively used in recent years for diagnosing dental pathologies and determining their boundaries and content. Unlike other imaging techniques, CBCT provides detailed and distinctive information about the pathologies by enabling a three-dimensional (3D) image of the region to be displayed...
July 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28650783/conservative-treatment-of-multiple-keratocystic-odontogenic-tumors-in-a-young-patient-with-nevoid-basal-cell-carcinoma-syndrome-by-decompression-a-7-year-follow-up-study
#13
Su-Hyun Kim, Min-Seok Oh, Yo-Seob Seo, Jin-Young Kim, Soon-Hyeun Nam, Su-Min Lim
Multiple keratocystic odontogenic tumors (KCOT) occurred in a young child is challenging problem in the field of pediatric dentistry, and might have been related to nevoid basal cell carcinoma syndrome (NBCCS). Because of high recurrence rate of KCOTs, complete surgical resection is generally accepted as definitive treatment. However, complete surgical resection could induce negative effect on the development of permanent teeth and growth of jaw. Herein, we reported successful treatment case of young KCOT patient with NBCCS...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28635992/odontogenic-tumors-a-retrospective-clinicopathological-study-from-two-italian-centers
#14
C Rubini, M Mascitti, A Santarelli, A Tempesta, L Limongelli, G Favia, E Maiorano
Objective: The aim of this retrospective study was to perform an epidemiological analysis of all odontogenic tumors treated in the University Hospitals "Ospedali Riuniti" in Ancona and "Policlinico" in Bari, from 1990 to 2015. Materials and methods: A retrospective survey of 277 patients treated for odontogenic tumors from 1990 to 2015 was performed. Data were retrieved from the archives of the above quoted Sections of Pathology. The lesions were classified according to 2005 WHO histological classification, and the following variables were analyzed: age, sex, histopathological diagnosis, site distribution, tumor size, and relapses...
March 2017: Pathologica
https://www.readbyqxmd.com/read/28611319/assessing-alpha-tocopherol-levels-in-patients-with-keratocystic-odontogenic-tumor-a-cross-sectional-study
#15
Bhargavi Krishna Ayinampudi, Sushmita Bhargavi Varikoti, Pacha Venkat Baghirath, B Hari Vinay, Ch Gayathri, Ashalata Gannepalli
AIMS AND OBJECTIVES: A keratocystic odontogenic tumour (KCOT) is a benign uni- or multicystic, intraosseous tumour of odontogenic origin, with a characteristic lining of parakeratinized stratified squamous epithelium and potential for aggressive, infiltrative behaviour. Various studies in hamsters showed that, alpha-Tocopherol, which is an active biological form of Vitamin E, is a potent antioxidant known to inhibit tumour formation and also regression of established tumours. So, the aim of the present pilot study was to assess the levels of Alpha-Tocopherol(Vitamin E) in Patients with KCOT and compare them with Vitamin E levels in normal healthy individuals...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28584604/p53-protein-expression-in-dental-follicle-dentigerous-cyst-odontogenic-keratocyst-and-inflammatory-subtypes-of-cysts-an-immunohistochemical-study
#16
Mashhadiabbas Fatemeh, Arab Sepideh, Bagheri Seyedeh Sara, Mahdavi Nazanin
OBJECTIVES: An odontogenic keratocyst (OKC) is a developmental odontogenic cyst with aggressive clinical behavior. This cyst shows a different growth mechanism from the more common dentigerous cyst and now has been renamed as a keratocystic odontogenic tumor (KCOT). Inflammation can assist tumor growth via different mechanisms including dysregulation of the p53 gene. This study aims to assess and compare the expression of tumor suppressor gene p53 in inflamed and non-inflamed types of OKC and dentigerous cyst...
May 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28521454/histopathological-and-immunohistochemical-study-in-keratocystic-odontogenic-tumors-predictive-factors-of-recurrence
#17
Tomofumi Naruse, Kentaro Yamashita, Souichi Yanamoto, Satoshi Rokutanda, Yuki Matsushita, Yuki Sakamoto, Hiroshi Sakamoto, Hisazumi Ikeda, Tohru Ikeda, Izumi Asahina, Masahiro Umeda
The aim of the present study was to identify the most useful markers for predicting recurrence of keratocystic odontogenic tumors (KCOTs). A total of 65 tumor samples from 63 patients diagnosed with typical parakeratinized cysts and KCOTs between 1992 and 2014 were retrospectively studied. Clinical and histopathological data and treatment modality were reviewed. In addition, the expression profiles of Ki-67, cluster of differentiation (CD)34 and podoplanin were assessed using immunohistochemistry. The association between these factors and the rate of KCOT recurrence was evaluated...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28512636/expression-of-yap-taz-in-keratocystic-odontogenic-tumors-and-its-possible-association-with-proliferative-behavior
#18
Qi-Wen Man, Yan-Qi Ma, Jin-Yuan Liu, Yi Zhao, Bing Liu, Yi-Fang Zhao
The aim of this study is to clarify whether YAP/TAZ is involved in the pathogenesis and proliferative growth of keratocystic odontogenic tumor (KCOT). The expression levels of YAP/TAZ and downstream proteins and genes in normal oral mucosa (OM) and KCOT were determined and compared by immunohistochemistry and real-time quantitative PCR. The results showed that the expression of YAP/TAZ and downstream proteins (Cyr61, CTGF) was significantly upregulated in KCOT with upregulation of Ki-67 compared to OM. Importantly, the mRNA levels of transcription factors (TEAD1, TEAD4, and RUNX2) and cell cycle related genes (CDK2, PCNA), which interact with the transcriptional coactivators YAP/TAZ, are also upregulated in the KCOT...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28499501/potential-involvement-of-chondroitin-sulfate-a-in-the-pathogenesis-of-ameloblastoma
#19
Xiangjun Li, Hiroshi Kurita, Tiepeng Xiao, Kyou Iijima, Kenji Kurashina, Jun Nakayama
Ameloblastoma is classified as a benign odontogenic tumor characterized by locally invasive behavior and high risk of recurrence. Here, we evaluate a potential role for glycosaminoglycan, a structural component of cell membranes and extracellular matrix, in ameloblstoma pathogenesis. We subjected formalin-fixed, paraffin-embedded tissue sections of 34 cases of ameloblastoma, 10 of odontogenic keratocyst, and 17 of dentigerous cyst to immunohistochemistry using monoclonal antibodies recognizing chondroitin sulfate A (CS-A), heparan sulfate (HS), and keratan sulfate (KS)...
May 9, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28489118/analysis-of-glut-1-glut-3-and-angiogenic-index-in-syndromic-and-non-syndromic-keratocystic-odontogenic-tumors
#20
Rafaella Bastos Leite, Roberta Barroso Cavalcante, Renato Luiz Maia Nogueira, Lélia Batista de Souza, Leão Pereira Pinto, Cassiano Francisco Weege Nonaka
The aim of this study was to evaluate the immunoexpression of glucose transporters 1 (GLUT-1) and 3 (GLUT-3) in keratocystic odontogenic tumors associated with Gorlin syndrome (SKOTs) and non-syndromic keratocystic odontogenic tumors (NSKOTs), and to establish correlations with the angiogenic index. Seventeen primary NSKOTs, seven recurrent NSKOTs, and 17 SKOTs were selected for the study. The percentage of immunopositive cells for GLUT-1 and GLUT-3 in the epithelial component of the tumors was assessed. The angiogenic index was determined by microvessel count...
April 27, 2017: Brazilian Oral Research
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