Bone, Cartilage, Soft Tissue Sarcoma Flashcards

1
Q

bone ca staging system

A

enneking staging system

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2
Q

bone ca mets location

A

almost all sarcomas met to lung, esp peripheral

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3
Q

osteosarcoma detection on radiographs

A

SUNBURST pattern caused by outward growth of bony spicules

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4
Q

chondrosarcoma most common location

A

prox femur

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5
Q

chondrosarcoma spread

A

lung

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6
Q

fibrosarcoma location

A

long tubular bones= femur, tibia

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7
Q

fibrosarcoma spread

A

lung

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8
Q

giant cell ca epidemiology

A

commonly seen in previously rad tx fld

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9
Q

giant cell ca location

A
  • MOST COMMON AROUND KNEE
  • long bones= femur, tibia
  • also prox humerus, prox femur, sacrum, pelvis
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10
Q

ewing’s location

A
  • DIAPHYSIS
  • any bone, any part of body & soft tissue
  • most common lower half
  • most common in diaphysis, less metaphysis, rare epiphysis
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11
Q

Ewing’s detection on radiographs

A

ONION SKIN APPEARANCE

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12
Q

ewing’s xrt field margins

A
  • lat strip norm tissue spread

- usu 4-5 cm margin

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13
Q

mm etiology

A

increase plasma cells

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14
Q

mm location

A
  • any bone

- vert bodies rare

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15
Q

mm tx XRT

A

30 Gy for pain control

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16
Q

mets location

A
  • vert bodies
  • pelvis
  • ribs
17
Q

sts spread

A
  • PRIMARY SPREAD= HEMATOLOGIC
  • local growth patter longitudinal axis of primary site compartment
  • lung
  • lymph nodes- rare
18
Q

sts shrinking fld technique

A
  • entire compartment 10 cm margin, then 5 cm margin, then 2-3 cm margin
  • leave 1-3 cm strip skin & soft tissue to avoid fibrosis & lymphedema
19
Q

sts p+ or brachy isotopes

A

Ir-192 or I-125

20
Q

sts intraoperative e- rad dose

A

10-20 Gy

21
Q

sts pre-op dose

A

50 Gy

22
Q

sts post op dose

A

65-75 Gy

23
Q

osteosarcoma XRT

A
  • RADIORESISTANT

- xrt used for pain but cure unusual

24
Q

chondrosarcoma XRT

A

RADIORESISTANT

25
Q

fibrosarcoma XRT

A

palliation

26
Q

giant cell ca XRT

A

RADIOSENSITIVE= control or palliation

27
Q

ewing’s tx XRT

A

55-60 Gy

28
Q

Sr-89 emits

A

beta emitter

29
Q

Sr-89 seeks

A

osteoblastic areas

30
Q

Sr-89 t1/2

A

50.5 days

31
Q

Sr-89 therapeutic effect

A

15 months; 1-3 wks for relief

32
Q

Sr-89 readministered how often

A

every 90 days

33
Q

sts epidemiology children

A

RHABDOMYOSARCOMA most common