When treating a high risk cutaneous squamous cell carcinoma post-operatively to the tumor bed, do you include the entire pre-op tumor in your PTV or do you include only the scar with margin?  

For example, if a 5 x 5 cm squamaous cell carcinoma with deep invasion has been resected via Mohs with negative margins, will your PTV include the entire pre-op 5 x 5 cm tumor?



Answer from: Radiation Oncologist at Academic Institution