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Bone Path 4 > Benign And Quasi > Flashcards

Benign And Quasi Flashcards

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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

24
Q

<2cm round/oval well defined and opaque

25
Ddx for osteoma
Osteoblastic mets
26
Polyps premalignant
Gardner's syndrome
27
Gardner's syndrome triad
Multiple osteomas Colonic polyps Soft tissue fibromas
28
MC in pelvis Sacrum Prox femur in metaphysis or epiphysis Rare in spine
Bone island (enostoma)
29
Bone island mc in children or adults
Adults
30
Brush/thorny border
Bone island (enostoma)
31
Ddx for enostoma
Osteoblastic mets Osteoid osteoma Osteoma
32
Any bone | MC cortex based
Osteoid osteoma
33
MC age for osteoid osteoma
10-25
34
Blastic with nidus
Osteoid osteoma
35
Cortical lesion: opague with nidus <1cm, if intracapsular or intramedullary = much less sclerosis
Osteoid osteoma
36
Increasingly severe, deep aching pain, not relieved by rest, worse at night and relieved by aspirin.
Osteoid osteoma
37
Relieved by aspirin
Osteoid osteoma
38
Ddx for osteoid osteoma
``` Brodie's abscess Osteomblastoma Bone island Stress fx Refer out ```
39
Neural arch of spine MC | Long bone metaphysis/diaphysis, hands, feet, skull, face
Osteoblastoma
40
Nidus >1cm
Osteoblastoma
41
Not relived by aspirin
Osteoblastoma
42
Ddx for osteoblastoma
Osteoid osteoma | Refer out
43
Mc tumor of phalanges
Enchondroma
44
Ddx for enchondroma
Chondrosarcoma
45
Ollier's diseas
Multiple enchondromatosis
46
Multiple enchondromatosis and soft tissue hemangiomas (phleobliths)
Mafucci's syndrome
47
Epiphyseal/apophyseal of femur, tibia, humerus, tarsals, pelvis
Chondroblastoma
48
Geographic, eccentric, sharp zone of transition, sclerotic border, periosteal response
Chondroblastoma
49
Ddx for chondroblastoma
Gct
50
Cortex based, 90% in tib/fib.
NOF (ages 8-20) | FCD (2-8)
51
>3cm in cortex and extends into medullary cavity, sclerotic margin, expansile
NOF
52
<2cm in cortex, sclerotic margin
FCD
53
Fallen fragment sign
Simple bone cyst
54
2/3 pathologic fracture
SBC
55
MC benign tumor of clavicle
ABC
56
May cross open growth plate
ABC
57
Ddx for ABC
GCT | Refer out

Bone Path 4 (3 decks)

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