Bones 2

Question 1

Bones commonly metastasize by carcinomas

Answer 1

Proximal humerus.
Proximal femur.
Ribs.
Sternum.
Vertebrae.
Pelvis.

Question 2

Reactive new bone formation is seen in?

Answer 2

Metastatic carcinoma of the prostate

Question 3

More sensitive for detecting metastatic bony lesions

Answer 3

MRI

Question 4

Secondary to radiotherapy

Answer 4

Osteosarcoma or Paget disease

Question 5

Ewing sarcoma + chondrosarcoma + echondroma + fibrous dysplasia

Answer 5

Diaphysis

Question 6

Osteosarcomas

Answer 6

Metaphysis

Question 7

Chondroblastoma + giant cell tumor

Answer 7

Epiphysis

Question 8

Benign developmental tumor like consisting of bone and hyaline

Answer 8

Osteochondroma

Question 9

Osteochondroma arises from

Answer 9

Metaphysis

Question 10

Osteochondroma can undergo malignant trans into

Answer 10

Chondrosarcoma

Question 11

Commonest primary malignant bone tumor

Answer 11

Osteosarcoma (metaphysis)

Question 12

Osteosarcoma consist of

Answer 12

1- malignant osteoblasts.

2- stroma.

Question 13

Neoplastic bone of the osteosarcoma gives ……… appearance on X ray.

Answer 13

Sun ray appearance

Question 14

Reactive bone of the osteosarcoma gives ……… on X ray

Answer 14

Codman triangle

Question 15

Commonest sites for chondrosarcoma

Answer 15

Proximal femur.
Proximal humerus.
Shoulder girdle.
Pelvic bones.
Ribs.

Question 16

Low grade chondrosarcomas are distinguished by

Answer 16

Clinical + radiological

Question 17

High grade chondrosarcoma are distinguished by

Answer 17

Immunohistochemistry

Question 18

Highly malignant + neuroectodermal origin + diaphysis

Answer 18

Ewing sarcoma

Question 19

May resemble osteomyelitis + onion ski on xray

Answer 19

Ewing sarcoma

Question 20

Has scanty cytoplasm containing glycogen

Answer 20

Ewing sarcoma

Question 21

Numerous osteoclastic giant cells + epiphysis of long bones

Answer 21

Giant cell tumor (osteoclastoma)

Question 22

Has soap bubble app on xray

Answer 22

Giant cell tumor

Question 23

Egg shell crackling on palpation

Answer 23

Giant cell tumor

Question 24

Most cases are benign but some are locally malignant

Answer 24

Giant cell tumor

Question 25

Infiltration by lymphocytes + hyperplasia of thesynovial lining is seen in

Answer 25

RA

Question 26

Fibrous ankylosis is seen in

Answer 26

RA

Question 27

Commonest chronic joint disease

Answer 27

Osteoarthritis

Question 28

Eburnation is seen in

Answer 28

Osteoarthritis

Question 29

Gout vs Pseudo-gout

Answer 29

Gout = uric acid.

P. Gout = calcium pyrophosphate.

Question 30

Serum ureate above …… in adult male and ……. in adult female is increased.

Answer 30

7 , 6

Question 31

Tophi is seen in

Answer 31

Gout

Question 32

Negative for RF

Answer 32

Seronegative spondyloarthropathies