RABDOMIOSARCOMA Flashcards

1
Q

Caracteristicas rabdomiosarcoma

A
  • 3.5% del cancer infantil
    -raro en jovenes adultos
    -sarcoma de tejidos blandos mas comun en niños
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2
Q

Tipos de rabdomiosarcoma:

A

-Embrionario 60%
-Alveolar 20%
-Pleomorfico 20%

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3
Q

Sx de linea germinal con mas predisposición

A

-Li-Fraumeni (TP53)
-Neurofibromatosis tipo 1 (NF1)
-DICER1

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4
Q

Rabdomiosarcoma Embrionario

A

Infantiles
-mejor pronostico
-cabeza, cuello, orbita
-regiones parameningeas

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5
Q

R embrionario (botrioides)

A

-menos comun de los embrionarios
-mejor pronostico
-organos huecos revertidos con mucosa
-vagina, vejiga, nasofaringe, v biliares

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6
Q

R. embrionario (fusocelular)

A

progresion maligna
-mas comun en adultos
-mas comun en paratesticular
-extremidades, cara y cuello

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7
Q

Rabdomiosarcoma alveolar

A

PROGRESION RAPIDA
-células se adhieren a la periferia de los alveolos
-células neoplasicas dispuestas en espacios alveolares

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8
Q

Rabdomiosarcoma pleomorfico

A

-alto grado
- +10cm
-+frecunete en torax.
-generalmente en adultos

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9
Q

translocaciones de rabdomiosarcoma (según estado de fusión)

A

PAX3 Y PAX7 /FOXO1

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10
Q

t de PAX3-FOXO1

A

t(2,13)

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11
Q

t de PAX7-FOXO1

A

t(1,13)

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12
Q

caracteristicas PAX3-FOXO1

A

-mas frecuente
-mas metastasico

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13
Q

manifestaciones mas comunes

A

-cabeza y cuello 35-40%
- tracto genito urinario (20%)
-extremidades (20%)

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14
Q

manifestaciones comunes en cara y cuello

A

-nasofaringeo
-orbitales
-meninges

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15
Q

manifestaciones secundarias

A

-exoftalmos
-rm -> retroorbital

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16
Q

INMUNOHISTOQUIMICA (Antígenos específicos)

A

-Miogenina (Myod1) & Desmina

17
Q

Dx

A

-fish
-inmunohistoquimica