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Bone Path 4 > Benign And Quasi > Flashcards

Benign And Quasi Flashcards

1
Q

Lytic lesions

A 
FOG MACHINES
Fibrous dysplasia/fibrous cortical defect
Osteoblastoma
GCT
Mets/MM
ABC
Chondroblastoma/chondromyxoid fibroma
Hyperparathyroidism (brown tumor)
Infection (osteomyelitis)
Non-ossifying fibroma (NOF)
Enchondroma or eosinophilic granuloma (EG)
simple bone cyst
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2
Q

Benign tumors with chance of malignancy (3)

A

GCT (20%)
Osteochondroma (1% solitary; 20% HME)
Enchondroma if close to spine <1%; ollier’s disease 25-50%

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3
Q

Painful benign tumors (5)

A 
GCT
OO
Osteoblastoma
Chondroblastoma
ABC
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4
Q

PAINFUL SCOLIOSIS (3)

A

Osteoid osteoma (OO)
ABC
Osteoblastoma

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5
Q

Painless/expansile/lytic/sclerotic margin (3)

A

Enchondroma
NOF/FCD
SBC

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6
Q

Refer out!

A 
GCT
OO
Osteoblastoma
Chondroblastoma
ABC
SBC (painless)
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7
Q

Sacrum - MC site

A

GCT (osteoclastoma)

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8
Q

MC benign tumor of patella; also found in prox. Tibia, prox. Humerus and distal radius

A

GCT

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9
Q

Age/sex of GCT

A

20-40
Males
MOST AFTER GROWTH PLATE CLOSURE

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10
Q

Ddx for GCT

A

Chondroblastoma (refer out!)

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11
Q

Displaced cartilage from physis.
MC METAPHYSIS OF LONG BONES AND CORTEX BASED
85% IN FEMUR, HUMERUS, TIBIA.

A

Solitary osteochondroma

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12
Q

Age/sex of osteochondroma

A

10-35

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13
Q

MC BENIGN SKELETAL TUMOR AND 50% OF BENIGN TUMORS

A

OSTEOCHONDROMA

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14
Q

Popcorn appearance from calcified cartliage

A

Osteochodnroma

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15
Q

Bony exostosis
Cartialge cap w/ calcification
Sessile or pedunculated attachment to bone

A

Osteochondroma

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16
Q

Multiple osteochondromas

A

Hereditiary multiple exostosis
Benign but malignant degernation in 20%
30% have bayonet wrist deformity

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17
Q

MC benign tumor of spine

A

Hemangioma

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18
Q

MC in vertebrae and skull

A

Hemangioma

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19
Q

Age/sex of hemangioma

A

> 40

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20
Q

Curduroy cloth apperance

A

Hemangioma

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21
Q

Skull: round or oval lesions with sunburst pattern. Soft tissue: frequently contain phleboliths

A

Hamngioma

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22
Q

Ddx for hemangioma

A

Pagets

Osteoporosis

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23
Q

Membranous bone in frontal/ethmoid sinuses and skull

A

Osteoma

24
Q

<2cm round/oval well defined and opaque

A

Osteoma

25
Q

Ddx for osteoma

A

Osteoblastic mets

26
Q

Polyps premalignant

A

Gardner’s syndrome

27
Q

Gardner’s syndrome triad

A

Multiple osteomas
Colonic polyps
Soft tissue fibromas

28
Q

MC in pelvis
Sacrum
Prox femur in metaphysis or epiphysis
Rare in spine

A

Bone island (enostoma)

29
Q

Bone island mc in children or adults

A

Adults

30
Q

Brush/thorny border

A

Bone island (enostoma)

31
Q

Ddx for enostoma

A

Osteoblastic mets
Osteoid osteoma
Osteoma

32
Q

Any bone

MC cortex based

A

Osteoid osteoma

33
Q

MC age for osteoid osteoma

A

10-25

34
Q

Blastic with nidus

A

Osteoid osteoma

35
Q

Cortical lesion: opague with nidus <1cm, if intracapsular or intramedullary = much less sclerosis

A

Osteoid osteoma

36
Q

Increasingly severe, deep aching pain, not relieved by rest, worse at night and relieved by aspirin.

A

Osteoid osteoma

37
Q

Relieved by aspirin

A

Osteoid osteoma

38
Q

Ddx for osteoid osteoma

A 
Brodie's abscess
Osteomblastoma
Bone island
Stress fx
Refer out
39
Q

Neural arch of spine MC

Long bone metaphysis/diaphysis, hands, feet, skull, face

A

Osteoblastoma

40
Q

Nidus >1cm

A

Osteoblastoma

41
Q

Not relived by aspirin

A

Osteoblastoma

42
Q

Ddx for osteoblastoma

A

Osteoid osteoma

Refer out

43
Q

Mc tumor of phalanges

A

Enchondroma

44
Q

Ddx for enchondroma

A

Chondrosarcoma

45
Q

Ollier’s diseas

A

Multiple enchondromatosis

46
Q

Multiple enchondromatosis and soft tissue hemangiomas (phleobliths)

A

Mafucci’s syndrome

47
Q

Epiphyseal/apophyseal of femur, tibia, humerus, tarsals, pelvis

A

Chondroblastoma

48
Q

Geographic, eccentric, sharp zone of transition, sclerotic border, periosteal response

A

Chondroblastoma

49
Q

Ddx for chondroblastoma

A

Gct

50
Q

Cortex based, 90% in tib/fib.

A

NOF (ages 8-20)

FCD (2-8)

51
Q

> 3cm in cortex and extends into medullary cavity, sclerotic margin, expansile

A

NOF

52
Q

<2cm in cortex, sclerotic margin

A

FCD

53
Q

Fallen fragment sign

A

Simple bone cyst

54
Q

2/3 pathologic fracture

A

SBC

55
Q

MC benign tumor of clavicle

A

ABC

56
Q

May cross open growth plate

A

ABC

57
Q

Ddx for ABC

A

GCT

Refer out

Bone Path 4 (3 decks)

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