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When treating the tumor bed for Wilms tumor, care should be taken to include the entire width of the spine to prevent:
scoliosis
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Which of the following is NOT an associated risk factor for pediatric solid tumors?
parasites
(yes for: enviornment, ionizing radiation, & prenatal factors)
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The most common symptom of Wilms tumor:
abdominal mass
-
Nephroblastomas metastasize more commonly to the:
Lung
(Wilms also to LUNG)
-
Neuroblastomas originate in the:
neural crest tissue
(notice it is NEUROblastoma-NOT NEPHROblastoma)
-
Which of the primary brain tumors typically spread to the CSF?
medullablastoma
(also ependymoma)
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The most common symptom of Ewing's sarcoma:
pain
-
The most frequent orbital malignancy in children:
retinoblastoma
-
Wilms tumor originates in what kind of cell:
nephroblasts
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Which type of childhood cancer is mostly associate with prophyalactic irradiation of the CNS:
ALL
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Match:
allogenic donor______ A. self
autogolous donor_____ B.compatible match
syngenic donor_____ C. identical twin
- allogenic
donor: B.compatible match
autogolous donor: A. self
syngenic donor: C. identical twin
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Most important latent side effects from radiation therapy to the pediatric patient include:(2)
- Impaired bone growth
- secondary cancers
-
Aggressive management for retinoblastoma is enucleation. What is it?
surgical removal of the orbit(eye)
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When caring for preschool children it is important to:
Keep communication simple and honest
-
For adolescents, it is important to:
Acknowledge that MODESTY and PRIVACY are paramount
-
Your 17 year old Hodgkin disease pt is worried about not having hair back in time for the prom. An acceptable response might beL
I know someone you can speak to about creative alternatives
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FIND ANGLE OF TABLE KICK:
SAD technique, 6x beam
whole brain:POP lats field size 15 x 20, SSD 93
spine field: 8 x 30
(to avoid overlap at the field junction, table kicks will be used during treatment of lateral brain fields)
6.1°
- A=length of brain field (20)
- 2SSD= 2 x SSD (186)
- 20/186 =0.1075 then press 2nd or Inv button on calculator, then press tan-1
- Answer is 6.1°
Table is kicked TOWARDS gantry on brain fields, SO
- Right lateral brain field: kicked to 353.9° (360-6.1)
- Left lateral brain field: kicked to 6.1°
- tab
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Calculate the MUs for POP lats:
36 Gy in 24 fxs
15 x 20 field size
reference dose rate: 0.996 cGy/MU
OF: 1.028
TAR: 0.794
- 92 MU
- dose= 75 cGy per field (3600/24=150 which is divided by two because there are two fields=75)
- 75/(.996)(1.028)(.794)=92 MU
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CSI was planned for a tall 12 year old with a treatment are 8x48 cm. The limits of the collimator, on the 100 cm isocentric linac, is 40x40cm. The min extended distance for this case is:
Part 2: what would the actual collimator setting be?
120 cm
- Part 2: 6.7 x 40we know that one side will be set for 40, we just need to know what the other will be:
- 8/120=x/100
- 120x=800
- x=6.7 cm
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