MSK radiology metabolic and endocrine Flashcards Preview

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Flashcards in MSK radiology metabolic and endocrine Deck (21):
1

where is bone mineral density measured?

hip and spine

2

normal BMD

-1 SD

3

osteopenia BMd

-1 to -2.5

4

osteoporosis BMD

> - 2.5

5

how much bone density has to be reduced to see in xray?

50%

6

xray findings in osteoporosis?

thin / absent trabeculae with thick remaining trabaculae
thinned / irregular scalloped cortex
intracortical tunnelling and porosity

7

spine in osteoporosis?

vertical striaed appearance due to loss of horizontal trabeculae

8

what deformities are seen in osteoporosis in spine?

wedege
biconcave
crush

9

Sacrum in osteoporosis?

insufficiency fracture parallel to SI joint

10

insufficiency fracture in ?scintigraphy .. what sign

honda sign

11

MRI and scintigraphy in osteoporosis?

sensitive in detecting femoral neck insufficiency fracture

12

what are the common sites of insufficiency fracture?

pubic rami
sacrum
vertebrae
calcaneus
distal forearm
proximal femur
vertebral bodies

13

which vertebral levels are more prone for stress fracture

below T7

above T7 it is rare

14

osteoporosis type I?

occurs in post menopausal women
15-20 years after menopause
disproportionate loss of trabecular bone

15

osteoprosis type II?

senile osteoporosis more than 75 years due to hyperparathyroidism
there is proportionate loss of trabecular and cortical bone

16

sudeck atrophy?

overactivity of sympathetic nervous system causing pain, swelling and hyperemia with excessive bone resorption

17

common cause of sudek atrophy

trauma/ fracture

18

idiopathic juvenile osteoporosis - age

occurs in prepubertal children

19

how long does it present

2-4 years

20

common location?

Vertebral bodies and long bones
commonly distal tibial metaphysis

21

how sever is this condition

it maybe life threatening if severe kyphoscoliosi with respiratory failure