Pediatrics-Mosby board review questions

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Author:
jaxkaty5437
ID:
262148
Filename:
Pediatrics-Mosby board review questions
Updated:
2014-03-08 09:40:36
Tags:
radiation therapy
Folders:
RTT Board Review,Mosby Board Review Questions
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Pediatrics-Mosby board review questions
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  1. When treating the tumor bed for Wilms tumor, care should be taken to include the entire width of the spine to prevent:
    scoliosis
  2. Which of the following is NOT an associated risk factor for pediatric solid tumors?
    parasites

    (yes for: enviornment, ionizing radiation, & prenatal factors)
  3. The most common symptom of Wilms tumor:
    abdominal mass
  4. Nephroblastomas metastasize more commonly to the:
    Lung

    (Wilms also to LUNG)
  5. Neuroblastomas originate in the:
    neural crest tissue

    (notice it is NEUROblastoma-NOT NEPHROblastoma)
  6. Which of the primary brain tumors typically spread to the CSF?
    medullablastoma

    (also ependymoma)
  7. The most common symptom of Ewing's sarcoma:
    pain
  8. The most frequent orbital malignancy in children:
    retinoblastoma
  9. Wilms tumor originates in what kind of cell:
    nephroblasts
  10. Which type of childhood cancer is mostly associate with prophyalactic irradiation of the CNS:
    ALL
  11. Match:
    allogenic donor______      A. self
    autogolous donor_____     B.compatible match
    syngenic donor_____        C. identical twin
    • allogenic donorB.compatible match

    autogolous donor:  A. self

    syngenic donor:  C. identical twin
  12. Most important latent side effects from radiation therapy to the pediatric patient include:(2)
    • Impaired bone growth
    • secondary cancers
  13. Aggressive management for retinoblastoma is enucleation. What is it?
    surgical removal of the orbit(eye)
  14. When caring for preschool children it is important to:
    Keep communication simple and honest
  15. For adolescents, it is important to:
    Acknowledge that MODESTY  and PRIVACY are paramount
  16. 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
  17. 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°

    • FORMULA:
    • tan-1  (A/2SSD) 

    • 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
  18. 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
  19. 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

    • 40/100=48/x
    • 40x=4800
    • x=120

    • Part 2:    6.7 x 40
    • we 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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