Bone Tumors

Question 1

Where does Osteoma form?

Answer 1

Surface of facial bones

Question 2

Osteoma is associated with what syndrome?

Answer 2

Gardner Syndrome

FAP, retroperitoneal fibromatosis, osteomas

Question 3

Osteoid Osteoma is benign tumor of what?

Answer 3

Osteoblasts

Question 4

Where does Osteoid Osteoma form?

Answer 4

diaphysis of long bones in cortex (femur)

Question 5

Compare osteoid Osteoma to osteoblastoma

Answer 5

Osteoblastoma is larger than 2cm, arises in vertebrae, and pain does not respond to aspirin. Osteoid Osteoma responds to aspirin

Question 6

Most common benign tumor of bone?

Answer 6

Osteochondroma

Question 7

where does osteochondroma form?

Answer 7

arises from lateral projection of growth plate (metaphysis) continuous with marrow space

Question 8

Osteosarcoma is malignant proliferation of what?

Answer 8

osteoblasts

Question 9

Osteosarcoma arises where?

Answer 9

metaphysis of long bones around knee

Question 10

Osteosarcoma risk is increased in what 3 groups

Answer 10

familial retinoblastoma, Paget Disease of Bone, radiation exposure

Question 11

sunburst appearance and lifting of periosteum (Codman Triangle)

Answer 11

Osteosarcoma

Question 12

Histo of Osteosarcoma

Answer 12

Pleiomorphic cells that produce osteoid

Question 13

only tumor on epiphysis

Answer 13

Giant cell Tumor, around the knee

Question 14

Soap bubble appearance on X-Ray

Answer 14

Giant Cell Tumor

Question 15

Ewing Sarcoma is derived from what?

Answer 15

neuroectoderm

Question 16

where does Ewing Sarcoma arise?

Answer 16

diaphysis of long bones, male children

Question 17

Periosteum is laying layers of bone (onion skin) on X-Ray

Answer 17

Ewing Sarcoma

Question 18

small, round blue cells resembling lymphocytes

Answer 18

Ewing Sarcoma

Question 19

where does chondroma arise from?

Answer 19

medulla of small bones of hands and feet

Question 20

where does Chondrosarcoma arise from?

Answer 20

medulla of pelvis or central skeleton