Radiation Oncology
Expert insights on radiation treatment planning, techniques, toxicity management, and multimodal cancer care.
Recent Discussions
How do you sequence radiation and capecitabine in breast cancer patients receiving adjuvant capecitabine for residual disease after neoadjuvant chemotherapy?
According to personal communication with Dr. Masakazu Toi (June 13, 2017), the corresponding author of the CREATE-X NEJM publication, radiotherapy was administered prior to capecitabine in the majority of cases on this study. It is worth noting that in CALGB 49907, a randomized trial comparing capec...
In ES-SCLC presenting with limited asymptomatic brain metastases and treated upfront with systemic therapy alone (carbo/etop/atezo), how would you approach the brain if MRI shows PR after a few cycles?
In our practice, we would typically watch such a patient on systemic therapy. However, we would stress the need for vigilant monitoring and likely administration of RT (SRS ideally) at the carbo/etop/atezo transition to atezo monotherapy, given the poor intracranial efficacy of the maintenance syste...
What factors do you consider when selecting dose/fractionation for whole brain radiotherapy?
I assume this question is for brain metastases patients who are not eligible for hippocampal avoidance WBRT (ineligible criteria including but not limited to - mets 5 mm within either hippocampus, germ cell/small cell/lymphoma, leptomeningeal disease, etc.) - my default WBRT dose fractionation is 30...
Should we be stopping new starts of patients who can be triaged for 2-3 months like prostate cancers on ADT when significant community spread of COVID-19 is detectable in our area?
I would for those patients requiring ADT, which is the way I interpreted the question. I want to elaborate more because @Dr. First Last brought up other scenarios we should consider and he brings some more good points: Many patients could get active surveillance for a period of time before ADT is co...
Would you offer hippocampal sparing whole brain radiation for patients with brain metastases due to ES-SCLC?
Until we have built-in auto-segmentation, I find the RTOG contouring atlas very helpful for manual contouring of the hippocampus. I tend to use the lateral ventricle as my main landmark, and look for the circle of gray matter located medial to it. Once I've drawn a hippocampus, I'll look at it in th...
Would you ever consider stopping immunotherapy in a patient with metastatic melanoma after achieving a good response?
Yes, I would consider stopping immunotherapy in a patient with metastatic melanoma after achieving a good response.Data of 655 melanoma patients treated in pembrolizumab phase 1 KEYNOTE-001 study has shown 95 patients (14.5%) achieved CR after a median follow-up of 32 months. Treatment was discontin...
What are best practices for radiation oncology patient and staff precautions with the COVID-19 pandemic?
COVID Update 1/30/21 Wow, it's been almost a year. Here are some updates from our practices at University of Maryland. We have successfully treated both PUIs and COVID+ patients at all of our practices. We have yet to have a patient to staff (or staff to patient) transmission. We do not break patien...
Given COVID-19, is there a good hypofractionated regimen for postmastectomy radiation for locally advanced breast cancer?
In light of COVID-19, we offer 2.66 x 16 PMRT with comprehensive RNI. This regimen is under study in ALLIANCE A221505, commonly known as RT-CHARM. Primary endpoint is reconstruction complications at 2 years. We discuss with reconstructed patients (most all will take if offered). Routinely given to u...
Would you consider modifying T&O fractionation during the COVID-19 pandemic?
We have been using 7gy x 4 instead of 5 fraction regimen in the past. A 2 fraction regimen showed lower local control in comparison to 4 fractions in the IAEA randomized trial.
Do you use either memantine or hippocampal sparing technique to preserve cognitive function when giving whole brain radiotherapy?
Dr. @Dr. First Last and I put together the response below:We use memantine and hippocampal sparing technique for all brain metastasis patients who are planning to receive WBRT. This is based off the recently published phase III trial NRG CC001 that found hippocampal avoidance WBRT plus memantine res...