Odontogenic cysts and tumors michael underbrink, md anna pou, md february, 2002 introduction variety of cysts and tumors uniquely derived from tissues of. Radicular cyst is the most common up to two thirds of all cysts of the jaws. Ppt odontogenic cysts and tumors powerpoint presentation. The inflamed tissue stimulates the growth of residual embryonic epithelia cells and eventually leads to the formation of a cyst. Odontogenic cysts and tumors are distinct entities and quite a common occurrence in. The world health organization classification of odontogenic. Biopsy necessary to establish definitive diagnosis.
Pdf the world health organization classification of. Three angels broadcasting network 3abn recommended for you new. Management of extensive dentigerous cysts british dental. Amongst all oral lesions, prevalence of odontogenic tumor is 0. Ppt pseudotumors and cysts powerpoint presentation. Also called as odontogenic ghost cell cyst or gorlin cyst. Mar 21, 2017 botryoid odontogenic cyst it is a variant of lateral odontogenic cyst, but that the term botryoid odontogenic cyst should be retained because of the tendency of this variant to recur if inadequately removed. Odontogenic keratocyst okc is a special type of odontogenic cyst that shows aggressive clinical behavior, a high recurrence rate, and an association with nevoid basal cell carcinoma syndrome. Thesource of epithelium is from theenamel organ, the reduced enamelepithelium, the cell rests of malassez orthe remnants of the dental lamina.
Odontogenic cysts and tumors are distinct entities and quite a common occurrence in the jaw bones. Dentigerous cyst associated with the crowns of non erupted teeth glandular odontogenic cyst. Pseudotumors and cysts odontogenic x non odontogenic. Odontomas are non aggressive, hamartomatous developmental malformations or lesions of odontogenic origin, which consists of enamel, dentin, cementum and pulpal tissue. Odontogenic cyst free download as powerpoint presentation. The reading of the word 3abn sabbath school panel q4 2019 duration.
A cyst which encloses the crown and is dentigerous cyst dc is a benign cyst. Dentigerous cysts represent the second most common odontogenic cysts of the jaws after radicular cysts and are usually associated with the crowns of unerupted permanent teeth and rarely deciduous teeth. Some are inflammatory while others are developmental. The primary predictor variable was the histopathologic diagnosis, grouped into odontogenic tumors ots, non ots, and odontogenic cysts. Odontogenic cysts and tumors ppt linkedin slideshare. Odontogenic cyst and non odontogenic cyst epithelium. The calcifying ghost cell odontogenic cyst cgcoc was first described by gorlin et al. This report describes a case of ooc involving posterior part of the mandible that mimicked periapical cyst in a 14yearold boy. The ganglion cyst, which presents in the tmj, has been added to this conventional classification for completeness.
Ooc is characterised by a lessaggressive behaviour and a low rate of recurrence. Epitheliallined cysts b non odontogenic midpalatal. Keratocyst in the jaws, these can appear solitary or associated with the gorlingoltz or nevoid basal cell carcinoma syndrome. All other inflammatory cysts are intraosseous except salivary cysts and parasitic cysts 58. Goc is very rare and only 111 cases have been documented in the english literature so far. Fissural cysts of oral origin nasopalatine duct cyst median palatal cyst globulomaxillary cyst median mandibular cyst nasolabial cyst palatal and alveolar cyst of new born epsteins pearls and bohns nodules thyroglossal cyst epidermal inclusion cyst dermoid cyst heterotopic oral gastrointestinal cyst lymphoepithelial cyst.
Osteosarcomas occur more commonly in the appendicular than axial skeleton. Odontogenic cyst and non odontogenic cyst epithelium anatomy. Dentigerous cyst, the second most prevalent cyst, is associated with the crown of non erupted tooth. Lateral periodontal cyst, developmental in origin, typically is observed in the cuspidbicuspid region of the mandible and less frequently in the maxilla. A dentigerous cyst, the most common odontogenic cyst, lacks the basal palisading and corrugated parakeratinized surface. Of note, a dentigerous cyst is, by definition, always associated with an unerupted tooth. Kcot can be associated with the naevoid basal cell carcinoma syndrome nbccs. The calcifying odontogenic cyst coc is an uncommon odontogenic lesion with a somewhat wide spectrum of histologic features. Periapical cyst the periapical cyst, otherwise known as radicular cyst, is the most common odontogenic cyst. Odontogenic cysts and neoplasms odontogenic cysts and neoplasms adenomatoid odontogenic tumor enamel organ or dental lamina origin young patients. Quizlet flashcards, activities and games help you improve your grades. Soft tissue cyst unrelated to branchial arches, with histologic features similar to 2nd branchial arch cyst epidemiology most common intraosseous, nonodontogenic cyst of the jaw is the nasopalatine duct cyst 1% of the population. Orthokeratinised odontogenic cyst mimicking periapical cyst. Calcifying odontogenic cyst calcifying ghost cell odontogenic cyst.
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. Extramedullary plasmacytomas arise outside of bone, are typically mucocutaneous in location and occur most commonly in the mouth, on the feet or trunk and in the ears. The clinical presentation, gross and microscopic features, differential diagnosis, prognosis, and diagnostic pitfalls are addressed for inflammatory cysts periapical cyst, mandibular infected buccal cyst paradental cyst, developmental cysts dentigerous, lateral periodontal, glandular odontogenic, orthokeratinized odontogenic cyst, benign. The lesion forms around the crown of an unerupted tooth commonly the third molar and is typically diagnosed in patients between 30 and 40 years of age. Dentigerous cyst, odontogenic cysts, odontogenic tumors, radiography, dental introduction who is. Histopathological insight of complex odontoma associated. Aot is predominantly found in female patients, which usually arise in the second or third decade and is located more often in the maxilla than mandible and often associated with an unerupted permanent tooth. Some are composed only of odontogenic epithelium, while many are mixed i. The primary outcome variables were the incidence of. Hyperchromatic, cuboidal or columnar basal cell layer 3. Nbde part ii oral pathology at tufts university dental school.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. The lining of odontogenic cysts shows a potential for neoplastic transformation to non odontogenic malignancies like squamous cell carcinoma and mucoepidermoid carcinoma, and odontogenic tumors like ameloblastoma and adenoamatoid odontogenic tumor aot. Nasopalatine duct cyst is the most common non odontogeniccyst of the oral cavity occring in general population. View non odontogenic cyst ppts online, safely and virusfree. It may arise initially as a dentigerous cyst developing by expansion of the follicle along the lateral surface of the crown which eventually comes to lie on the lateral aspect of the root if tooth eruption is normal. The enamel epithelium surrounding the crown proliferates, and fluid collects between the layers. Left maxillary cystic lesion associated with the crown of the unerupted molar tooth 28 in keeping with an odontogenic keratocyst given the bony expansion. 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. Glandular odontogenic cyst goc is an uncommon developmental odontogenic cyst of jaws with a relative frequency between 0. This type of cyst forms when the contents of a dead and decaying tooth leaks into the tissue at the base of the tooth. 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. Orthokeratinised odontogenic cyst ooc denotes the odontogenic cyst that microscopically has an orthokeratinised epithelial lining. Nelson, in head and neck pathology third edition, 2019. Chapter 21 odontogenic and non odontogenic tumors of the jaws introduction.
Microscopically, the lesion is similar to the lateral periodontal cyst but exhibits some differences. The only non odontogenic cyst included in the 2017 classification is incisive canal cyst. Odontogenic cyst and non odontogenic cyst free download as powerpoint presentation. This inflammatory cyst originated from a reaction to dental pulp necrosis. Odontogenic cyst are a group of jaw cysts that are formed from tissues involved in odontogenesis tooth development. Non epitheliumlined cavities are classified as pseudocysts. Those that arise from odontogenic epithelium are called odontogenic, those that have their source in other epithelial structures are known as non odontogenic. Study 140 nbde part ii oral pathology flashcards from sherlin p. Odontogenic and nonodontogenic tumors update from the. Odontogenic and non odontogenic cysts flashcards quizlet. A cyst is a pathological cavity having fluid, semifluid or gaseous contents and which is not created by the accumulation of pus. The clinical presentation, gross and microscopic features, differential diagnosis, prognosis, and diagnostic pitfalls are addressed for inflammatory cysts periapical cyst, mandibular infected buccal cyst paradental cyst, developmental cysts dentigerous. Radicular cysts make around 5268% of all cysts affecting the human jaws. The wide range in the frequency with which various cystic lesions occur often helps narrow the differential diagnosis, table 4.
Multiple and bilateral dentigerous cysts are an extremely rare presentation in the absence of developmental. However, aot frequently resembles other odontogenic. Because the lesion sometimes appears as a solid noncystic lesion, referred to as odontogenic ghost cell tumor, it is no longer classified as one of the odontogenic cysts. However, cysts may also arise from prior trauma or surgery.
Reichart and philipsen prefer to describe these as cavities rather than cysts. Some tumors are true neoplasms, while some are hamartomas developmental malformations. Non epithelium lined cysts pseudocysts mucous extravasation cyst aneurysmal bone cyst solitary bone cyst. Most cysts, but not all, are lined by epithelium true cysts odontogenic keratocyst dentigerous cyst nasopalatine duct cyst etc. The calcifying ghost cell odontogenic cyst cgcoc is a rare example of a developmental odontogenic cyst, its occurrence constituting about 0. Radiologic and pathologic characteristics of benign and. The ooc is a developmental odontogenic cyst relatively rare. The nasopalatine duct can be divided into two types. Peak occurrence in the 2nd and 3rd decades asymptomatic, swelling on occasion. Intrabony cysts are most common in the jaws, because the mandible and maxilla are.
The first group is characterized by specific odontogenic markers, histological similarities with odontogenic structures and anatomical considerations. The most important lesson from 83,000 brain scans daniel amen tedxorangecoast duration. Non odontogenic jaw cysts are cysts arising from epithelial remnants of embryonic ducts left behind after embryonal facial and jaw development. Adenomatoid odontogenic tumor aot is a rare odontogenic tumor often misdiagnosed as odontogenic cyst. Cysts of the jaws are classified into several categories depending on histogenesis and aetiology. Odontogenic cysts have histologic origins in the cells of the dental structures.
Comparison of components of odontogenic cyst fluids. May 25, 2016 the most important lesson from 83,000 brain scans daniel amen tedxorangecoast duration. Calcifying odontogenic cyst odontogenic keratocyst okc an okc is a non inflammatory odontogenic cyst that arises from the dental lamina. May represent odontogenic cyst or neoplasm, or non odontogenic tumor.
Chapter 21 odontogenic and nonodontogenic tumors of the jaws introduction. Although cysts are common in the jaws, most are radicular cysts of in. Oral cysts 18 are divided into two major groups based on odontogenesis. Odontogenic tumors comprise a complex group of lesions with varied histopathological and clinical features. A free powerpoint ppt presentation displayed as a flash slide show on id. This inflammatory cyst originated from a reaction to dental pulp necrosis dentigerous cyst, the second most prevalent cyst, is associated with the crown of non. 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. Odontogenic and non odontogenic cysts 2 of 3 youtube. Nonodontogenic cyst definition of nonodontogenic cyst by. Bilateral maxillary dentigerous cysts in a nonsyndromic. Intact, non inflamed cyst lined by thin 24 cells thick stratified squamous epithelium. Primordial cyst the kcot is the least common, but most dangerous odontogenic cyst.
On imaging, they usually present as a welldefined and unilocular radiolucency surrounding the crown of an unerupted or impacted tooth within the mandible. The dentigerous cyst is the second most common cyst of the jaws comprising 1420 per cent of all jaw cysts, and they are more frequent in males and more common in the mandible. Mar 31, 2020 the most common type of odontogenic cyst is the periapical or radicular cyst. The second group 1,3 includes cysts that originate from specific. The world health organization classification of odontogenic lesions. Follicular dentigerous cyst is the most common developmental odontogenic cyst. A cyst is a uni or multilocular, epitheliumlined cavity of various etiologies that contains liquid or gaseous materials. The odontogenic keratocyst thus appeared in both the 1st 1971 and 2nd 1992 editions of the who classifications.
Most cysts, but not all, are lined by epithelium kramer 1974 3. Dentigerous cysts, also called follicular cysts, are slow growing benign and non inflammatory odontogenic cysts that are thought to be developmental in origin. Teeth develop from budlike invagination of ectodermal lining of primitive oral cavity epithelium. Cysts shows a potential for neoplastic transformation to non odontogenic. Other odontogenic cysts must be considered in the differential diagnosis. Histologic features of central giant cell granuloma consist of a proliferation of fibrous tissue, hemorrhagic focuses, hemosiderin deposits, osteoclastlike giant cells and reactive bone formation. Cysts are classified according to the cell of origin, with the majority of cysts in the jaw arising from odontogenic sources, 2. Odontogenic keratocyst this lesion may be associated with the nevoid basal cell carcinoma. Odontogenic cysts are closed sacs, and have a distinct membrane derived from rests of odontogenic epithelium. In clinical practice, both pseudocysts and cysts are generally referred to as cysts. Traumatic inflammatory non odontogenic cysts the most common cause leading to the such cysts are physical or mechanical trauma. The classification of jaw cysts includes 1 odontogenic cysts, 2 nonodontogenic cysts, and 3 pseudocysts. An unfamiliar presentation of a lateral periodontal cyst.
Odontogenic and nonodontogenic tumors update from the 4th edition of who 2017 classification. Introduction odontogenic cysts are those whicharise from the epithelium associatedwith the development of teeth. The most common odontogenic cyst reported is the radicular cyst. The epithelium in okc appears to have innate growth potential similar to some benign tumors. On radiograph and ct, is well circumscribed, rounded or heart shaped radiolucency of. Cysts may form in the alveolar bone, alveolar process or soft t.
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