Bone Tumours Flashcards
Where do (osteoid) osteomas most commonly occur?
Skull
What condition are osteomas associated with?
Gardner’s syndrome (subtype of FAP)
What is the commonest benign bone tumour?
Osteochondroma
In what age and gender are osteochondromas most common
Males
<20 years
What do osteochondromas look like?
Cartilage capped bony projection from external surface of bone
Where do giant cell tumours tend to grow?
Epiphysis of long bones
What do giant cell tumours look like on x-ray?
Soap bubble or double bubble appearance
What is the most common primary malignant bone tumour?
Osteosarcoma
What is commonest age for osteosarcoma to occur?
Children and adolescents
Where does osteosarcoma most commonly occur?
Metaphyseal region of long bones
X-ray findings of osteosarcoma
Codman triangle (from periosteal elevation)
Sunburst pattern
What predisposes to osteosarcoma?
Mutation of Rb gene
Paget’s disease
Radiotherapy
When point of life does Ewing’s sarcoma occur?
Children and adolescents
Where does Ewing’s sarcoma commonly occur?
Pelvis and long bones
Diaphysis
What does Ewing’s sarcoma look like on x-ray?
Onion skin appearance
