47. BENIGN NON-ODONTOGENIC TUMOURS OF THE JAWS

what is the classification for benign non-odontogenic tumours of the jaws?

1. osseous producing

- osteoma

- osteoid osteoma

- osteoblastoma

2. cartilage producing

- enchondroma

- osteochondroma

- periosteal chondroma

- chondroblastoma

- chondromyxofibroma

3. fibrous producing

- non-ossifying fibroma

- fibrous dysplasia

- desmoplastic fibroma

- benign fibrous histiocytoma

4. non-matrix producing- eosiniphilic granuloma

5. vascular origin

- haemangioma

- lymphangioma

6. benign giant cell tumours

- giant cell tumour

- aneurysmal bone cyst

7. others

- lipoma

- schwannoma

- ganglion

- paediatric bone tumours

what are osteomas?

benign osteogenic tumours

can be located either on the periosteum or the endosteum

what are the xray features of the osteoma?

sharply defined

radiopaque

smooth

homogenous

looks like thickened bone

osteoma tx?

surgical excision

what is an osteoblastoma?

benign tumor of osteoblasts that is very similar to an osteoid osteoma

present with pain around the lesion

what are the xray features of the osteoblastoma?

combination of radiolucency and opacity

thin radiolucent lesions <2cm

well defined borders

what is the treatment for an osteoblastoma?

conservative surgical excision

what is a chondroma?

benign tumour of cartilage

explain the signs of chondromas

painless

slow growing

progressive swelling

may have mucosal irritation

explain the xray features of chondromas

irregular radiolucent lesions

calcification can be present

resorption of tooth roots

what is the treatment for chondromas?

conservative surgical excision

what are haemangiomas?

benign tumours of blood vessels

explain the clinical features of haemangiomas

painless and firm swellings which cause facial asymmetry

some discomfort may be felt

pulsatile bleeding

blueish colour of the gingiva

teeth are mobile

what are the differential diagnoses for haemangiomas?

giant cell tumours

ameloblastomas

odontogenic myxomas

what is the treatment for haemangiomas?

surgical treatment with excision beyond the margins

explain the xray features of haemangiomas

very varying in presentation

usually have poor margins

multilocular and irregular appearances