Parotid Fields
parotid
FIELD BORDERS
  • Mixed photon (6 Mv) and electron (16-20 Mev)
  • Zygomatic arch
  • Masseter muscle
  • Mastoid process
  • Thyroid notch
field2
CONVENTIONAL RADIOTHERAPY
A: Unilateral wedge arrangement and isodose distribution using wedged pair
B: Ipsilateral 16 MeV electrons + 60 Co (4:1) electron beam field.

Post-operative Treatment

Setup and Field Arrangement

Parotid

  • just like primary parotid tumor
  • 12 MeV and upper neck nodes
  • 9 MeV for lower neck nodes

Dose

  • 50-54 Gy in 25 to 27 fractions
  • 6-12 Gy boost in 3-6 fractions
Bibliography
1. Chen AM, Grekin RC, Garcia J, Bucci MK, Margolis LW.Radiation therapy for cutaneous squamous cell carcinoma involving the parotid area lymph nodes: dose and volume considerations.Int J Radiat Oncol Biol Phys. 2007 Dec 1;69(5):1377-80.
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