2. Benign Tumors Flashcards Preview

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Flashcards in 2. Benign Tumors Deck (161)
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1

A round/oval, well circumscribed uniformly opaque calcific radiopacity that arises in membranous bones

Osteoma
(usually less than 2 cm)

2

MC benign tumor of nose and paranasal sinuses

Osteoma

3

found in paranasal sinuses, inner and outer skull tables

Osteoma

4

Fills the entire sinus
and may cause ocular disturbances, headaches, and sinusitis

Giant Osteomas

5

Mandibular Osteoma will cause

Mechanical and cosmetic problems

6

Osteomas may be associated with what syndrome?

Gardner’s Syndrome

7

Colonic polyposis, soft tissue fibromas, and multiple osteomas that are protuberant, oval, dense.

Gardener’s Syndrome:

8

Discrete area of sclerosis in located anywhere (except skull)

Bone Island (Enostoma)

9

Bone islands are symptomatic or Asymptomatic?

Asymptomatic and clinically insignificant

10

what distinguishes a Bone Island from blastic metastasis?

Brush border

11

bone islands affect what part of the bone?

Epiphysis and metaphysis but NOT the diaphysis

12

A giant bone island is larger than

1.0cm

13

DDx for Bone Island: (Enostoma)

• Blastic metastasis
• Osteoid osteoma
• Osteoma
• Osteopoikilosis

14

Bone Island are possibly caused by cortical bone that has failed to undergo __________ during the process of endochondral
ossification

medullary
resorption

15

Bone islands typically appear
as

round-to-ovoid sclerotic
intramedullary foci

16

The long axis of the bone
island is aligned ______ to
the long axis of the bone

parallel

17

Bone islands are composed of
cortical bone and appear as what signal intensity?

low signal intensity on MRI on all pulse sequences

18

Do bone islands typically appear "hot"
on bone scans?

NO

19

Radiolucent nidus with surrounding reactive
sclerosis in 10-25 yo.

Osteoid Osteoma

20

Pain from an osteoid osteoma is relieved by

aspirin

21

Gradual severe deep aching pain than can be referred to a nearby joint, worse at night, with Limited ROM, painful limp, stiffness, and weakness

Osteoid Osteoma

22

Painful rigid scoliosis from an Osteoid Osteoma is usually on the ______ side
of curve

concave

23

What bones does an osteoid osteoma affect?

50% in tibia and femur and 10% in spine

24

Osteoid Osteomas are
usually less than

1.0 cm

25

Highly vascularized fibrous connective tissue in osteoid osteomas

nidus (may not be seen)

26

may need what to Dx osteoid osteoma?

CT

27

Intramedullary OO do not produce much sclerosis
except the sclerosis

outside of the capsular bone region

28

Helps show bone edema around the nidus

MRI

29

Very high levels of have _________ been found in the
osteoid osteoma lesion

prostaglandins

30

– Aspirin also relieves pain (worse at night)
– Nidus >1.0 cm in size
– No angiographic vascular blush

Brodie’s Abscess