Osteosarcoma y Sarcoma de Ewing Flashcards

1
Q

osetosarcoma

A
  • rodilla es lo >afectado
  • > F hombres
  • 20 y 50 â
  • > común en femur DISTAL
  • dolor por semanas a meses
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2
Q

osteosarcoma se puede ver asociado a:

A
  • retinoblastoma (Sx retinoblastoma-osteosarcoma)
  • Sx Li Fraumenii
  • Enf de Ollier
  • Enf de Paget
  • osteoblastoma
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3
Q

osteosarcoma central/medular

A

convencional: osteoblastico, condroblastico o fibroblastico

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4
Q

osteosarcoma convencional

A

es >F de los 15-25 â
si es en >50 â es 2rio a Paget o previa displasia fibrina

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5
Q

osteosarcoma central de bajo grado

A
  • 30-40 â
  • dolor durante meses a â
  • femur distal/tibia proximal
  • antecedente de displasia fibrosa
  • dxdif: displasia fibrosa, fibroma, osteoblastoma, osteosarcoma convencional intramedular
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6
Q

osteosarcoma de cel pequeñas

A
  • > F mujeres, 20 â
  • 1.5% de los osteosarcomas
  • metáfisis de huesos largos
  • dolor e hinchazón
  • mal pronóstico
  • transloc 11;12

CD99, vimentina, osteocalcina, osteorectina, actina de musc especifico

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7
Q

osteosarcoma periferico paraosteal

A

no eleva el perioistio
SIN nuevo hueso periosteal
capucha de cartilago

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8
Q

osteosarcoma periferico periosteal

A

crecimiento de periostio
formacion de nuevo hueso periosteal

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9
Q

osteosarcoma perifefico de superficie de alto grado

A

mineralización y crecimiento rápido

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10
Q

osteosarcoma teleangiectasico

A

es >F en hombres, 20 â
4% de los osteosarcomas
femur distal

dxdif: quiste oseo aneurismatico, osteosarcoma convencional

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11
Q

CDK4, SAJ, MDM2

A

agresivos

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12
Q

genes asociados

A

N-MYC, FOS, catepsina L

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13
Q

susceptibilidad genetica

A

RB, p53

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14
Q

osteosarcoma agresivo, tiene diseminación

A

hematógena

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15
Q

Sarcoma de Ewing

A
  • 5-22 â
  • 2da neoplasia >F pedia
  • “tela de cebolla” en imagen
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16
Q

IMHQ del sarcoma de Ewing

A

CD99, FLI-1, vimentina, CK
negativo a: miogenina, cromogranina, CD45, MYO D1

17
Q

cxclx ewing

A

dolor, fiebre, pérdida de peso, leucocitosis, sedimentacion eritrocitaria aumentada

18
Q

EWSR1/FLI-1
t(11;22)(q24;q12)

A

sarcoma de Ewing

19
Q

factores de pronostico para sarcoma de Ewing

A
  • edad al dx (menor a 10 les va bien, mayores de 18 valen madre)
  • localización: extremidad distal/proximal son de buen pronostico, pelvis es de mal pronostico
  • menor a 8cm es de buen pronostico
  • estadio al dx