Neoplastic bone disease

Question 1

Xray of knee showing elevated periosteum and sunburst appearance

Answer 1

osteosarcoma - malig

Question 2

Xray showing lytic lesions with fluffy calcifications, often on axial skeleton

Answer 2

Chondrosarcoma - malig

Question 3

adolescent, X ray showing bull’seye sign (radiolucent nidus with sclerotic rim)

Answer 3

osteoid osteoma

at tibia/proximal femur

Question 4

benign tumour in neck of middle aged

Answer 4

osteoma

Question 5

X ray showing cotton wool calcification in hands

Answer 5

endochondroma (benign)

Question 6

xray - ‘mushroom’ bony spur on long bones near tendon attachment sites

Answer 6

osteochondroma

-> well defined cartilage capped bony spur on surface of bone

Question 7

Xray - soap bubble osteolysis of femur

Answer 7

fibrous dysplasia

Question 8

shepherds crook deformity at femur

Answer 8

fibrous dysplasia

Question 9

lytic, well defined, fluid filled unilocular cyst on humerus/femur

Answer 9

simple bone cyst

Question 10

x ray showing speckled mineralisation on tibia/proximal femur

Answer 10

osteoblastoma