Rabdomiosarcoma. Flashcards

1
Q

Rabdomiosarcoma. Definicion

A

Originada en celulas mesenquimales primitivas con capadicad de dif en musculo estriada
Casi exclusivo de edad pediatria

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2
Q

Rabdomiosarcoma. Subtipos histologicos.

A

Embrionario y alveolar

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3
Q

Rabdomiosarcoma. Subtipos histologicos. Embrionario

A

Perdida de la heterocigocidad de la banda cromosomica 11p15.5
En todas las edades

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4
Q

Rabdomiosarcoma. Subtipos histologicos. Alveolar

A

Traslocacion reciproca t(2;3) patognomonica
Produce proteina quimerica (PAX-FOXO1)
Mas fx en adolescentes

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5
Q

Rabdomiosarcoma. Localizacones mas fx

A

Cabeza y cuello (27-37%) proptosis, oftamoplejia
Tracto genitourinario (19-26%) vejiga, prostata, utero,cervix, vagina vulva y area paratesticular
Extremidades (17-20%) con disminacion linfatica regional a axila o ingle

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6
Q

Rabdomiosarcoma. Mets

A

15-20% mets al dx
Pulmon
MO
Hueso

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7
Q

Rabdomiosarcoma. Tx

A

QT + Cx
RT
o Ambos

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8
Q

Rabdomiosarcoma. Recurrencia, Segunda linea de tx curacion exitosa solo en estos casos.

A

Tumores botrioides

Tumores embrionariosa surgidos de un sito favorable y con reseccion completa en dx inicial

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9
Q
Rabdomiosarcoma. Caracterisicas. Cabeza y cuello 35%s
Orbita 9%
Parameningeo 16%
Otros 10%
Subtipo predominante: Embrionario
A

Proptois
Paralsisi de los nervios craneales, obstruccion articular o sinusal con sin drenaje
Tumor indoloro de crecimiento progresivo

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10
Q
Rabdomiosarcoma. Caracterisicas. Genitourinario 22%
Vejiga y prostata 13%
Vagina y utero 2% (subtipo botrioide)
Paratesticular 7%
Subtipo predominante: Embrionario
A

Hematuria, obstruccion urinaria
Tumor pelvico, descarga vaginal
Tumor indoloro

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11
Q

Rabdomiosarcoma. Caracterisicas. Extremidades 18%

Subtipo predominante: Alveolar 50%, indiferenciado

A

Edema de la region afectada

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