The wide range in the frequency with which various cystic lesions occur often helps narrow the differential diagnosis, table 4. A dentigerous cyst, the most common odontogenic cyst, lacks the basal palisading and corrugated parakeratinized surface. Dentigerous cyst associated with the crowns of non erupted teeth glandular odontogenic cyst. A cyst is a pathological cavity having fluid, semifluid or gaseous contents and which is not created by the accumulation of pus. The epithelium in okc appears to have innate growth potential similar to some benign tumors. Traumatic inflammatory non odontogenic cysts the most common cause leading to the such cysts are physical or mechanical trauma.
Odontogenic tumors comprise a complex group of lesions with varied histopathological and clinical features. Peak occurrence in the 2nd and 3rd decades asymptomatic, swelling on occasion. Three angels broadcasting network 3abn recommended for you new. An unfamiliar presentation of a lateral periodontal cyst. The most common odontogenic cyst reported is the radicular cyst. Intact, non inflamed cyst lined by thin 24 cells thick stratified squamous epithelium. Teeth develop from budlike invagination of ectodermal lining of primitive oral cavity epithelium. Dentigerous cyst, odontogenic cysts, odontogenic tumors, radiography, dental introduction who is. However, cysts may also arise from prior trauma or surgery. Bilateral maxillary dentigerous cysts in a nonsyndromic. 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. Some tumors are true neoplasms, while some are hamartomas developmental malformations.
Study 140 nbde part ii oral pathology flashcards from sherlin p. Ppt pseudotumors and cysts powerpoint presentation. Radicular cyst is the most common up to two thirds of all cysts of the jaws. Odontogenic keratocyst this lesion may be associated with the nevoid basal cell carcinoma. A free powerpoint ppt presentation displayed as a flash slide show on id.
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. Odontogenic cysts and tumors are distinct entities and quite a common occurrence in. The inflamed tissue stimulates the growth of residual embryonic epithelia cells and eventually leads to the formation of a cyst. By definition, most kcots develop instead of a tooth, arising from the dental lamina. Cysts of the jaws are classified into several categories depending on histogenesis and aetiology. 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. Odontogenic cyst are a group of jaw cysts that are formed from tissues involved in odontogenesis tooth development. Odontogenic and nonodontogenic tumors update from the. Hyperchromatic, cuboidal or columnar basal cell layer 3. Odontogenic cysts are closed sacs, and have a distinct membrane derived from rests of odontogenic epithelium. This inflammatory cyst originated from a reaction to dental pulp necrosis.
The calcifying odontogenic cyst coc is an uncommon odontogenic lesion with a somewhat wide spectrum of histologic features. Dentigerous cyst, the second most prevalent cyst, is associated with the crown of non erupted tooth. Most cysts, but not all, are lined by epithelium true cysts odontogenic keratocyst dentigerous cyst nasopalatine duct cyst etc. Introduction odontogenic cysts are those whicharise from the epithelium associatedwith the development of teeth. 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. Quizlet flashcards, activities and games help you improve your grades. Goc is very rare and only 111 cases have been documented in the english literature so far. Periapical cyst the periapical cyst, otherwise known as radicular cyst, is the most common odontogenic cyst. Intrabony cysts are most common in the jaws, because the mandible and maxilla are.
Some are composed only of odontogenic epithelium, while many are mixed i. Pseudotumors and cysts odontogenic x non odontogenic. This type of cyst forms when the contents of a dead and decaying tooth leaks into the tissue at the base of the tooth. Radicular cysts make around 5268% of all cysts affecting the human jaws. Calcifying odontogenic cyst odontogenic keratocyst okc an okc is a non inflammatory odontogenic cyst that arises from the dental lamina. Nbde part ii oral pathology at tufts university dental school. Odontogenic cyst free download as powerpoint presentation. Some are inflammatory while others are developmental. Other odontogenic cysts must be considered in the differential diagnosis.
May represent odontogenic cyst or neoplasm, or non odontogenic tumor. Ppt odontogenic cysts and tumors powerpoint presentation. Odontogenic cysts and neoplasms odontogenic cysts and neoplasms adenomatoid odontogenic tumor enamel organ or dental lamina origin young patients. Orthokeratinised odontogenic cyst mimicking periapical cyst. 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. In the 2nd edition4 two nonodontogenic cysts nasopalatine duct cyst and nasolabial cyst were included, but only the nasopalatine duct cyst is. The primary outcome variables were the incidence of. Nasopalatine duct cyst is the most common non odontogeniccyst of the oral cavity occring in general population. Cysts may form in the alveolar bone, alveolar process or soft t. Oral cysts 18 are divided into two major groups based on odontogenesis. Odontogenic and non odontogenic cysts flashcards quizlet. View non odontogenic cyst ppts online, safely and virusfree. Odontomas are non aggressive, hamartomatous developmental malformations or lesions of odontogenic origin, which consists of enamel, dentin, cementum and pulpal tissue.
This report describes a case of ooc involving posterior part of the mandible that mimicked periapical cyst in a 14yearold boy. The reading of the word 3abn sabbath school panel q4 2019 duration. The world health organization classification of odontogenic lesions. Cysts shows a potential for neoplastic transformation to non odontogenic. The ganglion cyst, which presents in the tmj, has been added to this conventional classification for completeness. The odontogenic keratocyst thus appeared in both the 1st 1971 and 2nd 1992 editions of the who classifications.
Adenomatoid odontogenic tumor aot is a rare odontogenic tumor often misdiagnosed as odontogenic cyst. The world health organization classification of odontogenic. The calcifying ghost cell odontogenic cyst cgcoc is a rare example of a developmental odontogenic cyst, its occurrence constituting about 0. Dentigerous cysts, also called follicular cysts, are slow growing benign and non inflammatory odontogenic cysts that are thought to be developmental in origin. Management of extensive dentigerous cysts british dental. Nelson, in head and neck pathology third edition, 2019. 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. Odontogenic cyst and non odontogenic cyst epithelium. Non odontogenic jaw cysts are cysts arising from epithelial remnants of embryonic ducts left behind after embryonal facial and jaw development. 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.
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. 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. Nonodontogenic cyst definition of nonodontogenic cyst by. 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.
However, aot frequently resembles other odontogenic. Orthokeratinised odontogenic cyst ooc denotes the odontogenic cyst that microscopically has an orthokeratinised epithelial lining. Glandular odontogenic cyst goc is an uncommon developmental odontogenic cyst of jaws with a relative frequency between 0. Chapter 21 odontogenic and non odontogenic tumors of the jaws introduction. Histopathological insight of complex odontoma associated. Odontogenic and non odontogenic cysts 2 of 3 youtube. Also called as odontogenic ghost cell cyst or gorlin cyst. 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. Keratocyst in the jaws, these can appear solitary or associated with the gorlingoltz or nevoid basal cell carcinoma syndrome. Follicular dentigerous cyst is the most common developmental odontogenic cyst. Odontogenic cysts and tumors ppt linkedin slideshare. All other inflammatory cysts are intraosseous except salivary cysts and parasitic cysts 58. Mar 31, 2020 the most common type of odontogenic cyst is the periapical or radicular cyst.
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. Odontogenic and nonodontogenic tumors update from the 4th edition of who 2017 classification. Thesource of epithelium is from theenamel organ, the reduced enamelepithelium, the cell rests of malassez orthe remnants of the dental lamina. Calcifying odontogenic cyst calcifying ghost cell odontogenic cyst.
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. On imaging, they usually present as a welldefined and unilocular radiolucency surrounding the crown of an unerupted or impacted tooth within the mandible. Odontogenic cysts have histologic origins in the cells of the dental structures. The nasopalatine duct can be divided into two types. 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. The second group 1,3 includes cysts that originate from specific. The classification of jaw cysts includes 1 odontogenic cysts, 2 nonodontogenic cysts, and 3 pseudocysts. The first group is characterized by specific odontogenic markers, histological similarities with odontogenic structures and anatomical considerations. Of note, a dentigerous cyst is, by definition, always associated with an unerupted tooth. Radiologic and pathologic characteristics of benign and. 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.
Lateral periodontal cyst, developmental in origin, typically is observed in the cuspidbicuspid region of the mandible and less frequently in the maxilla. Microscopically, the lesion is similar to the lateral periodontal cyst but exhibits some differences. The enamel epithelium surrounding the crown proliferates, and fluid collects between the layers. May 25, 2016 the most important lesson from 83,000 brain scans daniel amen tedxorangecoast duration. Chapter 21 odontogenic and nonodontogenic tumors of the jaws introduction. Although cysts are common in the jaws, most are radicular cysts of in. Reichart and philipsen prefer to describe these as cavities rather than cysts. 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.
Epitheliallined cysts b non odontogenic midpalatal. Osteosarcomas occur more commonly in the appendicular than axial skeleton. Non epitheliumlined cavities are classified as pseudocysts. In clinical practice, both pseudocysts and cysts are generally referred to as cysts. Multiple and bilateral dentigerous cysts are an extremely rare presentation in the absence of developmental. The most important lesson from 83,000 brain scans daniel amen tedxorangecoast duration. Ooc is characterised by a lessaggressive behaviour and a low rate of recurrence. Pdf the world health organization classification of. Oral pathology clinical pathologic correlations, 4th edition. Most cysts, but not all, are lined by epithelium kramer 1974 3. Non epithelium lined cysts pseudocysts mucous extravasation cyst aneurysmal bone cyst solitary bone cyst. On radiograph and ct, is well circumscribed, rounded or heart shaped radiolucency of. Primordial cyst the kcot is the least common, but most dangerous odontogenic cyst. 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.
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. 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. Odontogenic cysts and tumors are distinct entities and quite a common occurrence in the jaw bones. The only non odontogenic cyst included in the 2017 classification is incisive canal cyst. Odontogenic cysts and tumors michael underbrink, md anna pou, md february, 2002 introduction variety of cysts and tumors uniquely derived from tissues of. Odontogenic cyst and non odontogenic cyst epithelium anatomy. Biopsy necessary to establish definitive diagnosis. 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. A cyst which encloses the crown and is dentigerous cyst dc is a benign cyst. Comparison of components of odontogenic cyst fluids. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Amongst all oral lesions, prevalence of odontogenic tumor is 0. Left maxillary cystic lesion associated with the crown of the unerupted molar tooth 28 in keeping with an odontogenic keratocyst given the bony expansion. The calcifying ghost cell odontogenic cyst cgcoc was first described by gorlin et al. The primary predictor variable was the histopathologic diagnosis, grouped into odontogenic tumors ots, non ots, and odontogenic cysts. Those that arise from odontogenic epithelium are called odontogenic, those that have their source in other epithelial structures are known as non odontogenic. Odontogenic cyst and non odontogenic cyst free download as powerpoint presentation. The ooc is a developmental odontogenic cyst relatively rare. A cyst is a uni or multilocular, epitheliumlined cavity of various etiologies that contains liquid or gaseous materials.
1478 572 1448 431 512 1013 573 613 697 1470 854 1145 1207 350 1361 786 716 1113 1405 652 1271 1523 1033 713 217 1079 422 1009 265 597 323 324 766