Osteosarcoma Flashcards

1
Q

Osteosarcoma es más frecuente en:

A

Fémur distal

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2
Q

Es la neoplasia ósea más frecuente en pediátricos

A

Osteosarcoma

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3
Q

Tipo de osteosarcoma más frecuente

A

Central o medular

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4
Q

Osteosarcomas centrales (4)

A
  • Osteoblástico
  • Condroblástico
  • Fibroblástico
  • Otros: telangiectásico
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5
Q

Osteosarcomas periféricos (3)

A

Son raros y generalmente de bajo grado
- Paraostal
- Periostal
- superficial de alto grado

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6
Q

El 90% de osteosarcoma son:

A

Convensionales

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7
Q

Osteosarcoma convencional (4)

A
  • 1ra y 2da década de vida
    • Frecuente
  • Metáfisis (fémur distal y tibia proximal)
  • Varones adolescentes
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8
Q

Histología del osteosarcoma convencional (2)

A
  • Células pleomórficas de mediano tamaño
  • Osteoide con células neoplásicas
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9
Q

Osteosarcoma telangiectásico (6)

A
  • El + agresivo
  • Metáfisis (fémur distal)
  • 2da década de vida
  • Lagunas de sangre
  • > en hombres
  • Dx diferencial: quiste óseo aneurismático (imagen de burbujas de jabón)
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10
Q

Osteosarcoma de células pequeñas (6)

A
  • El + raro, agresivo
  • diferencial de sarcoma de Ewing
  • lesiones líticas y tipo esclerosis
  • 2da década de vida
  • > en mujeres
  • Metáfisis
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11
Q

IHQ de osteosarcoma de células pequeñas (4)

A

CD99
Vimentina
Osteocalcina
Osteonectina

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12
Q

Traslocación de osteosarcoma de células pequeñas

A

11:22 (igual que Ewing)

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13
Q

Si es en diáfisis, síntomas sistémicos →

A

Ewing

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14
Q

Si esta en la metáfisis, sin síntomas sistémicos y tiene osteoide →

A

Osteosarcoma

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