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Flashcards in Benign Tumors Deck (157)
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1

osteoma occurs in what type of bone

locations

membranous bones

outer skull and sinuses

2

how big is an osteoma

< 2cm

3

describe an osteoma on imaging

round, oval, well circumscribed

uniformly opaque

4

what is the mc benign tumor of the nose and paranasal sinuses

osteoma

5

what is gardners syndrome

multiple osteomas
and
colonic polyps

6

what does osteoma look like on MRI

low intensity on T1 and T2

7

where do bone islands occur

anywhere

mc in epiphysis and metaphysis

not diaphysis

also not seen in skull

8

what does bone island look like on imaging

discrete area of sclerosis

brush border - help ddx from blastic mets

round oval well circumscribed

long axis parallel to bone

9

what is a enostoma

another term for bone island

10

do bone islands cause any symptoms

no

no pain or chance of malignancy

11

what does bone island look like on MRI

how about CT

how about on bone scan

low intensity on T1 and T2

bright on CT

cold on bone scan unless in growth period

12

how big is an osteoid osteoma

< 1cm

13

osteoid osteoma most commonly occur where

in what part of the bone

mc in tibia or femur

also in neural arch

metaphysis

14

osteoid osteomas can induce what defect in the spine due to tumor in neural arch

painful rigid scoliosis

15

which tumor contains radiolucent nidus with surrounding sclerosis or solid periosteal reaction

osteoid osteoma

16

which tumor contains a vascular blush on MRI

osteoid osteoma

17

osteoid osteomas occur in what age range

10-25

18

what are the symptoms of osteoid osteoma

gradual onset of severe deep aching pain

worse at night!

relieved by aspirin!

19

what do you use to diagnose osteoid osteoma

CT

20

how do you treat osteoid osteoma

thermoregulation

21

what does osteoid osteoma show on bone scan

how about MRI

intense uptake

low signal

22

what is the differential diagnosis for osteoid osteoma

brodies abscess

- infection (osteomyelitis) with same signs and symptoms but NO vascular blush and nidus > 1cm

osteoid osteoma is < 1cm

also brodies is cold on bone scan to differentiate

23

where does osteoblastoma occur

common in metaphysis

but loves posterior neural arch

24

what does osteoblastoma look like on imaging

expansile lesion

egg shell thin cortex and matrix

maybe sclerotic

25

what is the age range for osteoblastoma

10-20

26

what are the symptoms of osteoblastoma

gradual onset of pain

painful scoliosis if in posterior neural arch

pain not relieved by aspirin and not worse at night (compared to osteoid osteoma)

27

what ROM is lost in osteoblastoma

loss of extension

28

what is the differential diagnosis for osteoblastoma

ABC

29

can osteoblastomas become malignant

small percentage do

30

what does osteoblastoma look like on bone scan

how about MRI

HOT


high intensity on T2 due to increase fluid