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Flashcards in msk tumors contd.. Deck (53):
1

what is the other name for NOF?

fibrous xanthoma

2

common age of presentation of NOF?

children and and adolescents

3

Fibrous cortical defect VS non ossifying fibroma?

>2cm - NOF

4

radiographic findings in NOF?

lytic lesion
narrow ZOT
sclerotic margin
no matrix ca++
cortical disruption/ thinning

5

what is the most common soft tissue sarcoma in adults??

MFH

6

common location of MFH?

thigh and retroperitoneum

7

path in fibrous dyplasia?

replacemtn of normal cancellous tissue with fibrous tissue

8

types of FD?

mono-ostotic and polyostotic

9

complication of FD

fracture at femoral neck

10

appearance of FD?

central metadiaphyseal
bowing deformity (shpherds crook)

11

how to differentiate FD in base of skull from paget's

pagets occurs in adults

12

how does FD appear in pelvis?

cystic

13

how does FD appear in rib/ long bones

ground glass

14

Mc cune albright syndrome

precocious puberty
polyostotic FD
cafe au lait spots

15

mazabraud syndrome

fd and intramuscular myxomas in the same region of the body

16

GCT location and age

epiphysis
20-40 age

17

imaging features in GCT

lytic epiphyseal eccentrically placed at the articular end of long bones

18

where does GCT arise from

metaphysis, and spreads to epiphysis

19

multifocal GCT - where is it seen?

pagets or hyperparathyroidism

20

Eosiniphilic granuloma path?

abnormal histiocytes

21

age EG

5-10

22

appearance in skull

lytic lesion with beveled edge

23

floating tooth

when EG occurs in mandible or maxillar, erodes the alveolar process and causes this

24

appearance of LCH in long bones?

destructive lytic lesion with lamellated perisoteal reaction

25

what are the 2 most common pediatric primary bone tumor

osteosarcoma
ewings

26

radiographic appearance of ewings?

aggressive lesion
permeative bone destruction
aggressive periosteal reaction
soft tissue mass

27

DD for aggressive lytic lesion

osteomyelitis
EG
metastatic neuroblastoma

28

common imaging feature of MM?

multiple lytic lesion with endosteal scalloping.
relative sparing of pedicle in vertebra

29

what is bone scan finding in MM?

normal unlike mets

30

dd for MM

mets

31

single MM is called

plasmacytoma

32

plasmacytoma in vertebra appearance?

minibrain

33

lymphoma appearance

two
1.) aggressive lytic lesion
2.) ivory verterbral body

associated findings
soft tissue mass

34

finding in intraosseous liipoma?

central ring like calcification

35

what are the common sites for intraosseous lipoma?

calcaneus
subtrochantric region
distal tibia/ fibula
metatrasal

36

liposarcoma

size more than 10 cm
thick septations
globular / nodular soft tissue
less than 75% fat

37

chordoma location ?

midline
spheno-occipital region
body of C2
ca++ withing lesion

38

Simple bone cyst appearance?

lytic, fluid filled central expansile common in proximal diaphysis of femur/ humerus
absent periosteal reaction unless if fracture is present

39


what is the most pathognomoni sign of SBC?

fallen fragment sign

40

differential diagnosis of fluid fluid level

ABC
GCT
telangiectatic OS

41

ABC association?

can occur within a malignant tumor

42

location and age for ABC

central or eccentric unlike ABC which is always central

43

central buttressing periosteal reaction is seen in

ABC

44

prximal tibial lytic lesion with soap bubble appearance?

adamantinoma

45

vertebra - which part is involved in mets

post body
pedicles as they are rich in red marrow

46

lytic mets dd

lung
breast
thytoid
kidney
stomach / colon (mixed)

47

blastic mets

breast (lytic/ blastic)
prostate
seminoma
tcc
mucinous tumors
carcinoid

48

ca++ pattern in MO?

peripheral

49

what is the DD for MO?

parosteal OS

50

how to differentiate MO from Parosteal OS

size will reduce over time in MO
ca++ is central in parosteal OS

51

brown tumor is seen in ?

hyperparathyroidism

52

assocaiated findings in HPT?

subperiosteal bone resorption radial aspect of 2nd and 3rd middle phalanges
acromial end of clavicles
soft tissue ca++

53

renal osteodystrophy

ruggger jursey