Bone Tumors Brant

Question 1

Most common bone lesion

Answer 1

Nonossifying fibroma (NOF) or fibroxanthoma >2cm

fibrous cortical defect

Question 2

Metaphysis

Thin,sclerotic border that is scalloped and slighly expansile

Answer 2

Nonossifying fibroma

Question 3

Osteoblastas commonly occur in

Answer 3

Posterior elements of vertebral bodies

Question 4

Well defined lytic

Central location

Less than 30 yo

Answer 4

Solitary bone cyst

Benign

Question 5

Exclusive in the inferior surface of the calcaneus

Answer 5

Solitary bone cyst

Question 6

Lytic lesion with calcification
Occur in epiphysis
Less than 30 yo

Answer 6

Chondroblastoma

Question 7

Wide transition zone

Answer 7

Malignant

Question 8

Narrow transition zone

Answer 8

Benign

Question 9

Choldhood primary malignant tumors of bone

Answer 9

Osteosarcoma

Ewings sarcoma

Question 10

Malignant bone tumors after 40 yo

Answer 10

Mets

Multiple myeloma

Chonrosarcoma

Question 11

Almost all tumors have low signal on t1w1, which become high intensity in T2 except some

Answer 11

Malignant fibrous histiocytomas

Desmoid tumor

Low signal on both T1 and T2

Question 12

Any tumor with calcification will be low in signal on both T1 and T2

Answer 12

Low both T1 and T2

Question 13

Hemangiomas in MRI

Answer 13

High in both T1 and T2

Question 14

MC malignant primary tumor

Answer 14

Osteosarcoma

Question 15

Osteosarcoma on mR

Answer 15

Large soft tissue component with heterogenous high and low signals on T1 and T2

Question 16

Destructive lesions with obvious sclerosis

Metaphysis of child

Answer 16

Osteosarcomat

Question 17

Permeative( multiple small holes) in the diaphysis of a ling bone in child

Answer 17

Ewing sarcoma

Question 18

Onion slin typemof periositis

Answer 18

Ewings sarcoma

Question 19

Osteosarcoma that originates in the periosteom and grows outside the bone

Densest calcification is central and periphery is faintly calcified

Answer 19

Parosteal osteosarcoma

Question 20

Sunburst periositis in the diaphysis

Answer 20

Ewing sarcoma

Question 21

Amorphous snowflake calcification in >40 yo.

Answer 21

Chondrosarcoma

Question 22

Chondrosarcoma vs enchondroma?

Answer 22

MRI

With DT mass or swelling- chondrosarcoma

Question 23

Common malignant bone tumors in 30-40yo

Answer 23

GCT, parosteal sarcoma, malignant fibrous histiocytoma, primary lymphoma of bone

Question 24

The only malignant tumor that can involve a large amount of bone while the patient is asymptomatic

Answer 24

Primary lymphoma of bone( reticulum cell sarcoma)

Question 25

Primary lymphoma

Answer 25

Moth eaten or ewing sarcoma like appearance

Question 26

Typical metastatic renal cell ca

Answer 26

Lytic lesion in the diaphysis of femure

Never blastic

Question 27

Onemif the lesions that is not characteristically hot on radionuclide bone scan

Answer 27

Myeloma

Question 28

Multiple calcific loose bodies in hip joint

Answer 28

Synovial osteochondromatosis

Question 29

Irregular lytic lesions, predominantly cortical in nature with phleboliths

Answer 29

Hemangiomas

Question 30

Benign soft tissue process

Never has calcifications

MRI appearance: low signal lining the synovium on T1 and T2

Answer 30

Pigmented villododular synovitis

Question 31

Typical metastatic renal cell ca

Answer 31

Lytic lesion in the diaphysis of femure

Never blastic