Odontogenic cysts and tumors are a unique group of lesions due to their complex and variable history, histologic characteristics, and clinical behavior. Introduction a cyst is an epithelium lined sac containing fluid or semifluid material the epithelial cells first proliferate and later undergo degeneration and liquefaction grow by. Aot accounts for about 1% until 9% of all odontogenic tumors. Lateral periodontal cyst lpc is a relatively rare odontogenic pathology, representing about 0. Keratinocystic odontogenic tumor odontogenic keratocyst keratinocystic odontogenic tumor three important things associated with this diagnosis. Odontogenic cyst are a group of jaw cysts that are formed from tissues involved in odontogenesis tooth development. Calcifying odontogenic cyst calcifying odontogenic cyst. Oral pathology frequency of odontogenic cysts and tumors. Differential diagnosis ameloblastjc fibroma cystic ameloblastoma the internal structure in both of themdifferentiate adenomatoid odontogenic tumors calcified odontogenic cysts both can surround the crown androot of the involved tooth.
Eighty percent occur in the mandible, particularly. The term odontogenic implies being derived from toothforming structures. Nov 11, 20 dentigerous cysts are the most common odontongenic cysts and arise from the dental follicle. Oral pathology cysts and tumors of odontogenic origin part. It also highlights the reclassification of odontogenic keratocysts to keratocystic odontogenic tumours. Odontogenic cyst definition of odontogenic cyst by. Comparison of components of odontogenic cyst fluids.
Odontogenic cysts and odontogenic tumors in a large rural area. Odontogenic cysts are closed sacs, and have a distinct membrane derived from rests of odontogenic epithelium. Evidence of a radiopaque internalstructure should be sought in these two lesions. Classification malignant odontogenic tumors odontogenic car. Calcifying epithelial odontogenic tumor ceot, also known as a pindborg tumor, previously has been called adenoid adamintoblastoma, unusual ameloblastoma and cystic odontoma is typically located in the premolar and molar region of the mandible, although up to a third are found in the maxilla.
Adenomatoid odontogenic tumor aot is a rare odontogenic tumor which is often misdiagnosed as odontogenic cyst. Cysts and tumors derived from the odontogenic tissues constitute an unusually. The membrane of this type of cyst comes from the epithelial cells that produce the teeth. The nature of the neoplasm is determined by the stage of development at which the arrest occurs. Odontogenic tumors at university of colorado health. Lewis key points computed tomography can be highly specific in the diagnosis of mandibular masses given an organized approach that considers both odontogenic and nonodontogenic tumors and cysts. An odontogenic tumor is a neoplasm of the cells or tissues that initiate odontogenic processes examples include. Chapter 21 odontogenic and non odontogenic tumors of the jaws introduction. Calcifying odontogenic cysts have a wide age distribution that peaks at 10 to. There is an overall male predominance and the mandible is affected three times as commonly as the maxilla. Most are harmless, but they should be removed when possible because they occasionally may change into malignant growths, become infected, or obstruct a gland. An insight into pathogenesis and clinicopathologic features jitendra v kalburge 1, bhagyashri latti 2, vaishali kalburge 3, meena kulkarni 4 1 department of oral pathology and microbiology, government dental college and hospital, jamnagar, gujarat, india 2 department of oral pathology and microbiology, y.
The clinical presentation, gross and microscopic features, differential diagnosis, prognosis, and diagnostic pitfalls are addressed for inflammatory cysts periapical cyst, mandibular infected buccal cystparadental cyst, developmental cysts dentigerous, lateral periodontal, glandular odontogenic. Links to movies, ppt slideshows and any other multimedia files are not. A free powerpoint ppt presentation displayed as a flash slide show on id. Jun 07, 20 differential diagnosis ameloblastjc fibroma cystic ameloblastoma the internal structure in both of themdifferentiate adenomatoid odontogenic tumors calcified odontogenic cysts both can surround the crown androot of the involved tooth. These cysts are closed sacs that may contain air, fluids, or semisolid materials enclosed in a distinct membrane that is usually a biproduct of odontogenic epithelium.
Radicular cysts are the most frequent odontogenic cyst, followed by the dentigerous cyst and kcot when classified as a cyst. On the basis of 52 examples of calcifying odontogenic cysts associated. The glandular odontogenic cyst goc is a rare lesion, accounting for just 0. Radicular cyst was the most frequently diagnosed cyst and unicystic ameloblastoma was the most frequently diagnosed tumor. In 1992 who published the second edition of histological typing of odontogenic tumors.
The nomenclature of odontogenic and nonodontogenic cysts of the oral region is varied. These cysts show variable features and some lie on a cysttumour interface, making classification and diagnosis difficult. Odontogenic tumors represent the results of interruptions in or reactivation of tissues involved in the normal sequence of odontogenesis. Scribd is the worlds largest social reading and publishing site. Calcifying cystic odontogenic tumor a case report and. Some are composed only of odontogenic epithelium, while many are mixed i. Dentigerous cysts, also called follicular cysts, are slowgrowing benign and noninflammatory odontogenic cysts that are thought to be developmental in origin on imaging, they usually present as a welldefined and unilocular radiolucency surrounding the crown of an unerupted or impacted tooth within the mandible. There are approximately six different types of these cysts. Not only does aot predominantly present radiologically as a unilocular cystic lesion enclosing the unerupted tooth which is commonly mistaken as a.
Odontogenic cyst definition of odontogenic cyst by medical. Ameloblastomas are the most frequent odontogenic tumour, followed by kcot when classified as a tumour, odontogenic myxoma. The aim of this case is to illustrate that the clinician should consider that an apparent benign dentigerous cyst can suffer malignant transformation and that all material removed from a patient must be evaluated histologically. Calcifying odontogenic cyst tumorlike cyst of mandibular premolar region. Keratocysts have a high rate of recurrence and most commonly occur in the mandible. Odontogenic cysts and tumors ppt linkedin slideshare. Oralsurgery 548 dentalupdate julyaugust 2015 odontogenic cysts an overview abstract. It has been reported predominantly as an incidental. May 10, 2020 an odontogenic cyst is a membranebound sac that can be empty or filled with a viscous substance or fluid. Primary intraosseous carcinoma of the jaws pioscc might arise from odontogenic epithelium, more commonly from a previous odontogenic cyst.
Some tumors are true neoplasms, while some are hamartomas developmental malformations. Odontogenic cysts may occur in association with odontogenic tumors. Adenomatoid odontogenic tumor aot is a wellestablished benign epithelial lesion of odontogenic origin. Nov 20, 2014 lastly, as we approach the next iteration of the classification of odontogenic tumors, we would emphasize that classifications should be simple, reproducible, have clinical utility, and be easy for nonspecialist pathologists to understand and use. Cysts that derive their epithelium from tissues involved in tooth formation are classed odontogenic and can be inflammatory or developmental in origin. Odontogenic cysts and tumors periapical cyst or granuloma chronic localized osteitis dentigerous cyst odontogenic keratocyst keratocystic odontogenic.
Introduction a cyst is an epithelium lined sac containing fluid or. The developmental of epidermoid carcinoma from the lining epithelium. Chapter 21 odontogenic and nonodontogenic tumors of the jaws introduction. Oral pathology cysts and tumors of odontogenic origin part 01. Odontogenic tumors comprise a complex group of lesions deriving from odontogenic epithelium andor odontogenic ectomesenchyme elements, that still are, or have been, part of the tooth forming. Odontogenic tumors at university of colorado health sciences. Dentigerous cysts are the most common odontongenic cysts and arise from the dental follicle. Odontogenic cysts and tumors michael underbrink, md anna pou, md february, 2002 introduction variety of cysts and tumors uniquely derived from tissues of. Odontogenesis, odontogenic cysts, and odontogenic tumors. Call and register to join 9989626152 25 week daily session 5 8 pm monday to friday 400 hours of live online classes for mds entrance preparation. Rightfully called the master of disguise, this lesion has been known for its varied clinical and histoarchitectural patterns. It has sheets and strands of odontogenic epithelial cells. We present a suggested classification of odontogenic cysts, tumors, and allied conditions table 1.
These are relatively common lesions most are inflammatory cysts about 55% of all jaw cysts, dentigerous cysts 22% or odontogenic keratocysts keratocystic odontogenic tumours. Introduction a cyst is an epithelium lined sac containing fluid or semifluid material the epithelial cells first proliferate and later undergo degeneration and liquefaction grow by expansion, causing displacement of adjacent teeth 3. The orthokeratinizing odontogenic cyst is considered an unrelated entity without risk of recurrence or aggressive growth or association with nevoid basal cell carcinoma syndrome. Dec 03, 2019 odontogenic tumors represent the results of interruptions in or reactivation of tissues involved in the normal sequence of odontogenesis. Apr 26, 2014 call and register to join 9989626152 25 week daily session 5 8 pm monday to friday 400 hours of live online classes for mds entrance preparation. Odontogenic and non odontogenic tumors of the jaws are a relatively rare and heterogeneous group of benign and malignant neoplasms, hamartomas, and other bonerelated lesions that demonstrate great variability in etiology, biologic behavior, and clinical significance. Odontogenic cysts and tumors are growths that are usually involved in the process of tooth development or odontogenesis. Odontogenic tumors comprise a complex group of lesions with varied histopathological and clinical features. Ameloblastomas are the most common of odontogenic tumors. It is predominantly found in young and female patients, located more often in the. Odontogenic and nonodontogenic tumors of the jaws are a relatively rare and heterogeneous group of benign and malignant neoplasms, hamartomas, and other bonerelated lesions that demonstrate great variability in etiology, biologic behavior, and clinical significance. Has many features of odontogenic tumor, therefore it is placed in the category of tumors in the latest who classification of odontogenic cysts and tumors.
This article aims to discuss the clinical features, radiological assessment, histopathology and management of a variety of odontogenic cysts. Odontogenic cysts vary significantly in their frequency, behavior, and treatment. Nonodontogenic jaw cysts are cysts arising from epithelial remnants of embryonic ducts left behind after embryonal facial and jaw development. Cytokeratins 14 and 19 in odontogenic cysts and tumors. Because neoplastic and hamartomatous aberrations can occur at any stage of odontogenesis, combined features of odontogenic tumors with epithelial and mesenchymal components may arise within odontogenic cysts. Odontogenic cysts, tumors, and related jaw lesions ento key. Ppt odontogenic cysts and tumors powerpoint presentation. Odontogenic keratocyst because of its behavior, many oral pathologists now consider the okc an odontogenic tumor that has a cystic form 2005 classi. Ameloblastoma, a type of odontogenic tumor involving ameloblasts. Malignant transformation of an odontogenic cyst in a. An odontogenic cyst is a membranebound sac that can be empty or filled with a viscous substance or fluid. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Study 54 odontogenic tumors flashcards from leah k.
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