neoplastic bone disease

Question 1

bony outgrowth attatched to normal bone, also has GI polyps (colon)

Answer 1

osteoma, with associated gardners syndrome

Question 2

anatomy of bone

metaphysis / diaphysis

Answer 2

metaphysis is the flared bit of bone

diaphysis is the narrow middle

Question 3

shepherds crook deformity

Answer 3

fibrous dysplasia alters shape of femoral head like a hook

may also have soap bubble osteolysis

and albrights syndrome, dysplasia, cafe au lait, endorcine (preocious puberty, hyperthyroid)

Question 4

3 malignant bone tumour

Answer 4

osteomsarcoma ( bone forming)

chondrosarcoma (cartillage forming)

ewings sarcoma/PNET (undifferentiated)

Question 5

commonest bone sarcoma, peak in adolescence 60% in knee

codmans triangle

sunburst appearance

histology malignant mesenchymal cells / bone

ALP +ve (mineralised tissue)

Answer 5

osteosarcoma

Question 6

40yr+ pelvic pain

xray lytic lesions fluffy calcifications

Answer 6

chondrosarcoma

cartillage producing