Radiation Oncology
Expert insights on radiation treatment planning, techniques, toxicity management, and multimodal cancer care.
Recent Discussions
What fractionation would you use for a young patient with a schwannoma that has regrown within 2 years of resection?
This is a complex scenario given the 2-year time interval for progression in conjunction with a Ki-67 up to 30%. It is not clear within the question whether initial resection was gross total or subtotal and whether the diagnosis of cellular schwannoma and its focally very high Ki-67 index were reach...
What proton dose regimen would you use for locally recurrent esophageal cancer previously treated with chemoRT?
Like @Dr. First Last, I would also somewhat challenge the premise of the question. Typically, the dose-limiting structure for re-irradiating esophageal cancer is the esophagus itself, so protons do not offer an inherent advantage in this case. Protons may still be reasonable to reduce lung or heart ...
In your practice, what is your goal dose for boosting positive PA nodes in either the adjuvant or definitive treatment for cervical cancer?
The dose of RT is based on the risk of tumor recurrence tempered by normal tissue constraints. In general, known or suspected gross nodal disease is treated to 60 Gy; higher doses of 62-66 Gy may be used for large nodes that are not immediately adjacent to the duodenum, particularly if a portion of ...
How would you define the role for radiation in the management of a primary vulvar leiomyosarcoma in close proximity to anus?
Favor surgery followed by RT unless not operable without compromising anal function.
How would you manage the side effects/toxicities (e.g., pain, swelling, erythema) of adjuvant EBRT to the ear for cutaneous SCC?
I have had a few patients experience acute pain in the ear canal, probably from inflammation, wet desquamation, and bacterial overgrowth. Ciprodex Otic drops x 7-10 days have been helpful.
How do you approach designing the boost volume when PMRT is recommended for the indication of positive margins?
Have favored the positive quadrant with a scar if the deep margin is positive.
What screening tools or signs do you use to predict if a cancer patient is near end-of-life?
For most of us, long-time practicing oncologists, all we have to do to determine that one of our patients is at the end of their life is to be in the same room with them. No special computer programs or calculators are needed. Just look closely at the patient's current weight, their level of conscio...
How would you empirically manage a large sellar/suprasellar mass with encasement of the right cavernous and terminal internal carotid arteries?
Knowing the histology of the mass would really help in creating more accurate treatment recommendations. A biopsy of a sellar mass is usually accomplished by an endonasal-endoscopic transsphenoidal approach utilizing the expertise of an ENT surgeon and a skull-base neurosurgeon. However, in this cas...
Would you consider radiation alone or chemoradiation therapy for a small vulvar cancer near the urethra or clitoris?
Yes, I think radiation is worth considering in this situation. However, the morbidity of radiation is also significant with potential for edema and fibrosis in high dose volume. The consequence of that may arguably be worse than surgery. If we do treat with radiation, I would still add chemotherapy ...
What dose is required to gross disease in the definitive treatment of vulvar cancer?
As with all gynecologic carcinomas, the optimal dose is at least to some extent dependent on the volume of disease. However, our experience suggests that a minimum of 60 Gy should always be given for gross diasease, even when concurrent chemotherapy is being given. That said, for gross disease that ...