Cyst of the jaw Flashcards

Question

Rg and pathological features nasopalatine cyst

Answer 1

Radiograph Well-defined round, ovoid or heart shaped radiolucency Sclerotic margin anterior region of palate Pathology Lined by st. squ. Respiratory or cuboidal epithelium Neurovascular bundles found in capsule

Answer 2

child & adults premolar/molar region asymp, chance finding on Rg

Answer 3

variable sized radiolucency, irregular margin, well defined. Scalloping! Rough bony-walled cavity devoid of any detectable lining. NO epithelial lining Rapid healing follows Although will resolve spontaneously without

Answer 4

Clinical Children or young adults Mandible, post. part of body or angle Firm, painless swelling Radiograph Uni- or mulitilocular radiolucency with a ballooned out appearance due to gross cortical expansion

Answer 5

``` numerous, non-endothelial lined, blood-filled spaces varying size separated by cellular fibrous tissue multinucleated giant cells Pathogenesis unknown Many preceded by other 10 lesion of bone ```

Answer 6

developmental anomaly of mandible asymptomatic - Radiograph Round or oval, well demarcated radiolucency Between premolar region & angle of jaw usually located below inferior dental canal

Answer 7

Depression or concavity lingual aspect of mandible Varying depth Majority of cases, contains ectopic salivary tissue in continuity with SMG

Answer 8

Aggressive tumour originates from remnants of odontogenic epithelium of enamel organ/dental lamina PEAK AGE: adults (Usually >40 years old) FREQUENCY: Rare, but still most common odontogenic tumour SITE & SIZE: Posterior body/angle/ramus of mandible. Occasionally maxilla. Size very variable depending of age of lesion but can become very large and disfiguring SHAPE: multilocular, occasionally monolocular at early stage. Well defined and well corticated.

Answer 9

RADIODENSITY: Radiolucent with internal radiopaque septae ``` SIGNS AND SYMPTOMS: early stages asymptomatic adjacent teeth displaced facial deformity extensive expansion in all directions expansion usually bony hard and non tender (latter stages may get “egg shell crackling”) ``` TREATMENT: Surgical resection with margin normal bone.

Answer 10

Rare, benign mixed odontogenic tumour originating from both odontogenic epithelium and connective tissue of developing tooth germ. Radiographically closely resembles ameloblastoma but develops in younger age group AGE: Children and adolescents FREQUENCY: Rare SITE & SHAPE: Usually mandible in premolar/molar region. Variable size. Multilocular (monolocular in early stages). Smooth outline. Well defined and well corticated -adjacent teeth displaced

Answer 11

AGE: wide age range but usually < 40 years old SITE: 75% are intraosseous and either jaw may be involved. Majority arise anterior to first permanent molar. SIZE&SHAPE: Usually small about 1-3 cm in diameter. Shape is variable but usually monolocular. RADIODENSITY: initially radiolucent but in more advanced stage contains a variable amount of calcified radiopaque material EFFECTS: adjacent teeth usually displaced +/or resorbed. Bony expansion.

Answer 12

Very similar non-invasive tumours which originate from odontogenic CT fibroblasts of the developing tooth germ, which produce either excessive fibrous collagen (FIBROMA) or excessive ground substance (MYXOMA). Radiographically often indistinguishable. AGE: Young adults SITE: Usually posterior mandible or maxilla May arise in relation to root of tooth/crown or unerupted tooth or may take place of tooth missing from arch SIZE&SHAPE: Size is variable but may become large if left untreated. Usually multilocular -Rg -radiolucent with fine radiopaque septa -adjacent teeth loosened/displaced

Answer 13

Rare, benign slow growing tumour producing a rounded lobulated radiolucency of variable definition within the bone with a variable amount of internal calcification Anterior maxilla and posterior mandible most common sites. Although can also occur in the condylar and coronoid process. -intrinsic primary benign bone tumour

Answer 14

Rare benign tumour that occasionally affects the jaws, particularly the mandible. It is usually a developmental malformation (hamartoma) of the blood vessels in the marrow spaces. Can present at any age but usually adolescents Variable radiograpgic appearance including; moderately well defined zone of radiolucency within which trabeculae spaces are enlarged. Lesion presents therefore as multicystic “saop bubble or honecomb” appearance

Answer 15

Commonest primary malignant tumour of bone but is relatively rare in jaws. AGE: Usually around 30 years old at diagnosis. Occasionally, tumour presents in older patients eg in association with Paget’s disease of bone. SITE: Slightly more common in mandible than maxilla SIGNS + SYMPTOMS: Fairly rapidly enlarging swelling that may be accompanied by pain, numbness of lip, trismus and displacement of teeth. Ulceration of overlying skin and mucosa is a late feature.

Answer 16

RADIOGRAPHIC APPEARANCE: variable and depends on amount of normal bone destroyed by tumour and amount of neoplastic bone formed within lesion. Predominately osteolytic tumours produce irregular areas of radiolucency wheras sclerosing types in which tumour bone is formed, produce irregular areas of radiopacity. The two patterns may co-exist in the same tumour. A symmetrically widened PDL space has been reported as a feature of very early lesions PROGNOSIS: Overall 5 year survival for osteosarcoma of jaws is about 40%. Jaw lesions,in contrast to osteosarcomas at other sites, metastasise infrequently. However local recurrence rates are high.

Answer 17

AGE: Adults, middle aged SITE: Multiple lesions affecting - skull vault - posterior part of mandible - other parts of skeleton SIZE&SHAPE: Variable size. Round monolocular shape though multifocal. Well defined outline. Not corticated. RADIODENSITY: Radiolecent EFFECTS: Enlargement/Coalescence may lead to pathological fracture

Answer 18

Uncommon, non neoplastic mass in the jaws producing an expansile radiolucent lesion. AGE: Variable but usually young adolescents and adults under 30 years old. SITE: Anterior mandible. In region of deciduous dentition, often crossing midline. SIZE&SHAPE: Variable size. Can be up to 10 cm. Usually multilocular with well defined and well corticated outline. RADIODENSITY: Radiolucent -adjacent teeth displaced or resorbed

Answer 19

Inherited disorder. Usually autosomal dominant but many cases appear spontaneously. Radiographically lesions resemble closely other giant cell containing lesions. AGE: Children 2-6 years old SITE: Angle/Posterior mandible - bilateral SIZE&SHAPE: Variable size, up to several cms diameter. Multilocular with bilateral lesions typically symmetrical. RADIODENSITY: Radiolucent with internal radiopaque septa EFFECTS: Gross displacement of deciduous/permanent teeth. Extensive buccal/lingual expansion

Answer 20

Considered to represent a developmental tumour like lesion. Most cases (80%) are monostotic (limited to a single bone, often the jaw). AGE: 10 - 20 years of age SITE: Usually posterior maxilla SIZE&SHAPE: Variable size. Round shape. Poorly defined outline with no cortiaction RADIODENSITY: Initially radiolucent. Gradually becomes radiopaque to produce “ground glass” or “orange peel” -teeth displaced

Answer 21

keratocyst / dentigerous cys t/ radicular and residual cyst ``` Complications: Mainly related to size, position and type of cyst interference with IDC communication with Maxillary sinus pathological fracture Recurrence ```

Answer 22

Fenestration’ +/- grommet insertion Useful for large simple cysts, keratocyst, dentigerous cysts ``` Complications: Needs further surgery for removal cyst Long treatment before completion chance of re-infection? Uncomfortable with grommet in situ? ```

Answer 23

Removal of cyst with margin of ‘normal’ bone. Mainly used for ameloblastoma/sarcoma cases Normally have to have secondary procedure for reconstruction of defect

Cyst of the jaw Flashcards

(47 cards)