logging in or signing up odontogenic tumours Dr.Asifa Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 592 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: March 09, 2011 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript ODONTOGENIC TUMOURS: ODONTOGENIC TUMOURS ADENOMATOID ODONTOGENIC TUMOUR CALCIFYING EPITHELIAL ODONTOGENIC TUMOUR SQUAMOUS ODONTOENIC TUMOURClassification : Classification Tumors of odontogenic epithelium ameloblsatoma malignant ameloblastoma amelblastic carcinoma clear cell odontogenic epithelium adenomatoid odonto genic tumors calcifying epithelium odontogenic epitheliuum Squamous odontogenic tumorADENOMATOID ODONTOGENIC TUMOR,: ADENOMATOID ODONTOGENIC TUMOR,AOT: AOT A well circumscribed lesion derived from odontogenic epithelium Usually occurs around crowns of unerupted anterior teeth Of young patients Consists of epithelium in swirls and ductal patterns interspread with spherical calcification.AOT : AOT Origin from reduced enamel epithelium of the post secretory phase of enamel organ. Confirmed by ultrastructural and histochemical studies. Initially was designated as variant of ameloblastoma as adenoameloblastoma Some consider it to be hamartoma Now considered as epithelial odontogenic tumour with an inductive effectClinical features: Clinical features Age young pts 2/3 in between 10 to 19 yr. Site.anterior jaw twice as often in maxilla than mandible. Sex. female as twice than maxilla Presentation intra bony may be associated with unerupted teeth some time extraosseous Small asymptomatic large cause painless swellingradiographically: radiographically 75 % cases radiolucency involve crown of uneruted tooth usually canine DD from dentigerous cyst Located b/w roots of teeth as well delineated radiolucency May have snowflake radiolucencyhistopathology: histopathology On gross capsulated central portion solid or may show cystic degeneration M/C Spindle shaped cell in sheets strands Amorphous or crystalline calcifications and microcysts lined by ameloblast like cellsTreatment : Treatment Enucleation No aggressive behaviourCEOT: CEOT A locally aggressive tumor consisting of strands and medullary patterns of squamous and clear cells that are often accompanied by spherical calcification and amyloid staining hyaline depositsCalcifying epithelium OT: Calcifying epithelium OT Also called Pindborg tumor Rare but imp due to resemblance to poorly differentiated carcinoma !% of OT 200 cases reported Histogenesis not certain but thought to be stellate reticulum or dental lamina restsCEOT CL FEATURES: CEOT CL FEATURES Presentation intraosseou or extra osseous Age 20 to 60 mean 40 Mandible posterior region Slowly growing asymptomatic swellingradiographically: radiographically Diffuse radiolucency with faint flecks of calcified structure snow shower Intraosseos usually associated with uneruted or displaced teeth Margins scalloped multilocular or honeycomb or monolocularhistopathology: histopathology Sheets of variable cells with well defined cell mem and prominent intercellular bridges Nuclei pleomorhic, large hyper chromatic resembling carcinoma or smaller and more uniform Calcification and amyloid like material leisgang ringstreatment: treatment b/c of local invasion and without capsule radical margins as ameloblastomaSquamous odontogenic tumour: Squamous odontogenic tumour benign but occasionally aggressive epithelial odontogenic tumor first in1975 by Pullon et al Wide age distribution peak in 3 rd decade 2;1 male predilection More maxilla and anterior more than posteriorSq.odontogenic: Sq.odontogenic typical radiographic appearance is that of a triangular or semicircular radiolucency with the narrow part of the lesion toward the alveolar crest, often with a radiodense border, and located within the alveolar process between the roots of teeth.1–4 Root resorption has been described.Slide 25: numerous, variably sized and shaped, sometimes anastomosing islands of stratified squamous epithelium. oval to polygonal nonkeratinized cells surrounded by flattened, round, or focally cuboidal basaloid cellstreatment: treatment Curretage with excisionthanks: thanks You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.