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Tri 6 - Tumors > Lab > Flashcards

Flashcards in Lab Deck (16):
1

– 4-8 yo – Asymptomatic – Posterior – medial surface of distal
femur, lower extremity – Could be associated with avulsion
fracture at a muscle attachment

fibrous cortical defect

2

– 8-20 yo – Due to faulty ossification, and not a true neoplasm – Usu asymptomatic – Large lesion may be painful, >8 cm
• Pathologic fracture
• Stress fracture – MC distal tibia – Diametaphyseal and eccentric

Non-Ossifying Fibroma

3

– Located anywhere, except in skull – Discrete area of sclerosis in bone – Asymptomatic and clinically insignificant – Areas of compact bone subject to same metabolic influences
affecting skeletal system in general – Compact bone within normal bone spongiosa

bone island

4

are bone island pain generators

no

5

how do you know it is a T1 sequence MR

fatty bone marrow is highlighted

6

most common benign bone tumor of the hand

solitary enchondroma

7

– Geographic radiolucent expansile
lesion – Endosteal scalloping – Centrally placed in metaphysis – 50% have punctate calcification due to
cartilagenous matrix

Solitary Enchondroma

8

if fat goes black on a MR, what type of sequence

STIR/SPUR
shows water well

9

– Usu <1.0 cm in size – Radiolucent nidus with surrounding reactive
sclerosis – Nidus may calcify

osteoid osteoma

10

scoliosis cobbs angle has to be > than ____ degrees

10

11

DO NOT RESTRICT ACTIVITES IN SPINAL HEMANGIOMA

TRUE

12

polka dot appearance

hemangioma

13

hemangioma is best seen on what MRI

T1 and T2
low signal

14

tx for hemangioma of the skull

neuro surgery

15

when CSF is low signal

T1

16

MR with a black and graining look, fluid is only high signal

stir