orthokeratinized odontogenic cyst
Orthokeratinized odontogenic cyst OOC is a relatively rare odontogenic cyst characterized by the presence of orthokeratinized epithelial lining1 Here we reported an OOC that presented as a residual cyst at the right maxillary tuberosity in a 50-year-old female patient. At least three histogenetic explanations for the occurrence of cartilage in the present cystic lesion can be offered.
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Various studies have shown that OOC has typical characteristic clinicopathologic features when compared to other developmental odontogenic lesions such.
. Orthokeratinized odontogenic cyst OOC is a rare developmental odontogenic cyst characterized by orthokeratinized stratified squamous epithelial lining. However there had been controversy because the histological and clinical features of OOC and. They were originally believed to be part of the spectrum of Odontogenic Keratocyst but are now considered to be a distinct entity.
In the 4th edition of WHO Classification of Head and Neck Tumors 2017. The treatment of OOC is by enucleation and the prognosis following enucleation is excellent with a recurrence rate of less than 2. Orthokeratinized Odontogenic Cyst was included as a separate and specific entity for the first time in the 4th Edition of the World Health Organization WHO Classification of Head and Neck Tumors which was published in 2017 7.
Odontogenic keratocyst was designated as keratocystic odontogenic tumor KCOT in the new World Health Organization classification and OOC should be distinguished from KCOT for differences in histologic features and biologic behavior. We report 15 cases of such cyst type under the term of orthokeratinized odontogenic cyst OOC and compared their clinical histological and immunocytochemical. Orthokeratinized odontogenic cyse developmental odontogenic cysts characterised by an orthokeratinized strati-fied squamous epithelial lining.
To analyze the clinicopathologic features of 61 cases of OOC in a Chinese population. Recognition of OOC as a unique entity is of utmost importance as it bears. Orthokeratinized odontogenic cyst OOC is an odontogenic cyst was initially termed as the uncommon orthokeratinized type of odontogenic keratocyst by the World Health Organization.
The databases searched were the PubMed interface of MEDLINE and LILACS. 2 the coincidence of orthokeratinized odontogenic cyst 9 12 or epidermoid implantation cyst 13 and ectopic cartilage in a single lesion. The orthokeratinized odontogenic cyst OOC was recognized as a variant of odontogenic keratocyst OKC based on the presence of abundant orthokeratin in the cystic lining12 OKC has been renamed as keratocystic odontogenic tumor KCOT because it more appropriately reflects its local destructive and aggressive behavior3.
Orthokeratinized odontogenic cyst OOC is a relatively rare odontogenic cyst distinct from odontogenic keratocyst OKC. They are rare making up approximatelogenic cysts and they usually. The analysis of patients with multiple OOCs demonstrated that.
Intraosseous jaw cysts with a solely orthokeratinized lining epithelium have been suggested to differ from the typical odontogenic keratocysts OKC by exhibiting a less aggressive behaviour. 1 the odontogenic keratocyst exhibiting mural cartilaginous metaplasia 2 7. Cyst has orthokeratinized stratified squamous epithelial lining Cyst wall is fibrous and uninflamed Terminology Previously called orthokeratinized variant of odontogenic keratocyst OKC no longer recommended to use by WHO Epidemiology Comprised 105 of cases in series of odontogenic keratocysts Arch Pathol Lab Med 2010134271.
Orthokeratinized Odontogenic Cyst OOC is a rare developmental odontogenic cyst which was considered in the past to be a variant of Odontogenic keratocyst OKC later renamed as keratocystic odontogenic tumor KCOT. Orthokeratinized odontogenic cyst OOC a newly designated entity of odontogenic cysts is an intraosseous jaw cyst that is entirely or predominantly lined by orthokeratinized squamous epithelium. OOC had been previously coded as odontogenic keratocyst OKC and was termed as orthokeratinized variant of OKC.
They were first identified by Wright in 1981 2 and were originally thought to be part of the spectrum of Odontogenic Keratocyst OKC 3. Orthokeratinized Odontogenic Cyst OOC is a developmental odontogenic cyst characterised by a lining of orthokeratinized stratified squamous epithelium 1. Article historyThe odontogenic keratocysts are developmental cysts of the jaws that require proper diagnosis due to their potential for local aggressive growth recurrences and.
Histologic review revealed a unique histiocytic lining and some findings suggestive of the multipotentiality of the odontogenic epithelium. OOC was actually first described as a dermoid cyst as far back as 1927 by Schultz 8. The aim of this study was to report a large series of OOC to substantiate its clinicopathologic profiles and to investigate PTCH1 mutations in OOCs.
Root resorption and radiopaque foci. The aims of the review were to evaluate the principal clinical and conventional radiographic features of orthokeratinized odontogenic cyst OOC by systematic review SR and to compare the frequency of OOC between four global groups. OOCs shared similar radiologic findings with odontogenic keratocyst yet some showed features that have not been previously described.
Orthokeratinized odontogenic cyst OOC is a relatively uncommon developmental cyst of the jaw constituting about 10. However it was not until 1981 that Wright identified OOC as an. It usually occurs in mandible.
16 In 1981 Wright 2 reported 59 cases of what he then termed orthokeratinized variant of OKC which showed little clinical aggressiveness. Orthokeratinized Odontogenic Cyst OOC is a rare developmental odontogenic cyst which was considered in the past to be a variant of Odontogenic keratocyst OKC later renamed as keratocystic odontogenic tumor KCOT. Orthokeratinized odontogenic cyst OOC is a relatively uncommon developmental cyst comprising about 10 of cases that had been previously coded as odontogenic keratocysts OKCs.
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Figure 2 Orthokeratinized Odontogenic Cyst A Report Of Three Clinical Cases
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Orthokeratinized Odontogenic Cyst
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