Pediatric Tumors Flashcards
peds cns germ cell xrt
RADIOSENSITIVE
peds medulloblastoma xrt done when
post-op csi
peds medulloblastoma lat ports csi ant/sup/post border
sup/ant/post= flash
peds medulloblastoma spine ports csi sup border
sup= inf border of wb
wilm’s xrt low dose
10Gy
peds sts xrt post op dose
36-50.4 Gy
peds low grade astrocytoma xrt dose
50-54 Gy @ 180/fx
peds high grade astrocytoma xrt tx margins
2.5 cm margin (2-3 cm)
peds optic glioma rad tx fields
- large tailored fld
- 1.5 cm margin
peds ependymoma tx if csf seeding
csi
peds ependymoma csi dose
54-59.4 Gy
peds cns germ cell xrt tx
low dose csi
- boost to 50 Gy
- non-csi= 30-45 Gy to primary mass & supratent vent
peds brain stem glioma xrt margins
1.5 cm margin
peds brain stem glioma xrt ant border
ant clinoid (avoid optic chiasm ant to sella turcica)
peds brain stem glioma sup border
midbrain
peds brain stem glioma post border
mid-cerebellum
peds brain stem glioma inf border
bottom C1
peds medulloblastoma lat tx field OAR
- shield ant globe
- oropharynx
- neck
peds medulloblastoma xrt divergence determines ?
coll angle
peds medulloblastoma xrt csi spine length
spine to 2nd/3rd sacral
peds medulloblastoma xrt csi gap done how often
may be moved/feathered every 10Gy
peds medulloblastoma xrt csi dose per day/photon E
1.5-1.8 Gy @ 4-6 MV
peds medulloblastoma xrt csi boost what area to ? dose
boost post fossa to 55.8 Gy
peds medulloblastoma xrt chemo
chemo before & after