How do you delineate target volumes for patients who receive induction chemotherapy prior to definitive chemoradiation for locally advanced head and neck cancers?  

We almost always evaluate our patients prior to start of induction chemotherapy (unless referred from outside) for a physical examination and ordering all diagnostic tests. The main principle to keep in mind is that all pre-chemotherapy extent of the disease should be included in the treatment volum...

Based on pretreatment physical exam and imaging. If chemo was started prior to referral to you, educate your medical oncologist