Bone CA

Question 1

Codman’s triangle (elevation of perisosteum)

Answer 1

Osteosarcoma and Ewing’s sarcoma

Question 2

Most common bone malignancy in adolescents

Answer 2

Osteosarcoma

Question 3

90% occur in the metaphysis of long bones (MC in distal femur, proximal tibia, proximal humerus).

Answer 3

Osteosarcoma

Question 4

PUNCTATE OR RING & ARC APPEARANCE on XR

Answer 4

Chondrosarcoma

Question 5

systemic infection such as fever and irritability in addition to localized bone pain and swelling.

Answer 5

osteomyelitis

Question 6

Management is usually observation

Answer 6

Osteochondroma

Question 7

benign bone tumor and is characterized by a well-defined or sclerotic border, lack of destruction of the cortex, and lack of extension into the soft tissue on XR

Answer 7

Chondroblastoma

Question 8

Neonate with osteomylelits

Answer 8

Haemophilus Influenzae or GBHS

Question 9

Most common bone CA in children, 2nd MC malignancy

Answer 9

Ewing’s Onion Skin Sarcoma

Question 10

Surgical resection is 1st treatment of choice over Chemo

Answer 10

Chondrosarcoma

Question 11

MC METS to the lungs

Answer 11

Osteosarcoma

Question 12

Sickle cell patient with osteomyelitis

Answer 12

Salmonella

Question 13

periosteal reaction

Answer 13

Osteosarcoma

Question 14

Patients with sickle cell high risk for…

Answer 14

osteomyelitis from Salmonella

Question 15

Often PEDUNCULATED, GROWS AWAY FROM GROWTH PLATE and involves medullary tissue on XR

Answer 15

Osteochondroma

Question 16

ionizing radiation for treatment is a risk factor and occurs within two decades of Tx for this childhood bone CA

Answer 16

Osteosarcoma

Question 17

IV drug user with osteomyelitis

Answer 17

E. Coli, Pseudamonas, Klebsiella

Question 18

Most common sites of Ewing Sarcoma

Answer 18

Femur and pelvis

Question 19

“HAIR ON END” or “SUN RAY /BURST” appearance on XR

Answer 19

Osteosarcoma

Question 20

Onion skin on XR

Answer 20

Ewing’s Sarcoma

Question 21

Most common pathogen for osteomyelitis

Answer 21

S. Aureus

Question 22

Most common benign bone tumor in childhood

Answer 22

Osteochondroma

Question 23

Nocturnal pain unrelated to activity and relieved with NSAIDs or ASA

Answer 23

Osteoid Osteoma

Question 24

2nd peak 50-60y (especially if history of Paget disease of the bone or radiation therapy).

Answer 24

Osteosarcoma