Osteosarcoma

Question 1

Osteosarcoma

Answer 1

most common, but still rare.
occurs at any age- mostly young
Accounts for 53% of bone sarcomas in 10-14yr olds
Osteoid matrix

Question 2

Osteosarcoma (common sites)

Answer 2

Tibia
Femur
knee
shoulder
humerus

Question 3

Ewings sarcoma

Answer 3

common in young (0-14yrs) also teenagers.
Generally arise from medullary cavity with invasion of haversian system.
Femur ; pelvis, shoulder, girdle, ribs

Question 4

Chondrosarcoma

Answer 4

30-60yrs
cartilage cells
37% of all bone sarcomas

Question 5

Chondrosarcoma common sites

Answer 5

Pelvis
Femur
Humerus
Scapula
ribs

Question 6

Spindle cell sarcoma

Answer 6

Treated in a similar way to osteosarcoma
Adults >90
Diff types: undifferentiated sarcoma of bone
Fibrosarcoma- very rare
Leiomyosarcoma- very v rare

Question 7

Chordoma

Answer 7

Very rare
35-40% grow in skull/ bones middle of face
Remainder develop in spine

Question 8

Giant cell tumour
(osteoclastoma)

Answer 8

Tumour arising in 30-50yrs
common in long bones (around knee, humerus, radius)
“soap bubble” appearance