Radiation Oncology
Expert insights on radiation treatment planning, techniques, toxicity management, and multimodal cancer care.
Recent Discussions
How do you incorporate PCI into your management of patients with extensive stage SCLC?
I must admit, that I was never a fan of PCI in the extensive SCLC setting. With the publication of the Japanese study, I am definitely not strongly recommending PCI. I think it is good to see the patient so that we can discuss both PCI and thoracic consolidation, but I have been doing more thoracic ...
Would you offer radiation to someone with a positive NavDx but non-diagnostic LN FNA of a cystic node, with PET showing FDG-avid disease in the oropharynx?
I would confirm with a biopsy from the oropharynx.
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...
How does the potential for a patient to accept or forego adjuvant tamoxifen factor into your recommendations on adjuvant RT for DCIS?
In the RTOG 9804 trial, the only factors predicting for local control in the breast were the use of radiation and of tamoxifen. So for women who have hormone positive tumors, I strongly advocate for some treatment in addition to the lumpectomy.I find the results of the UK, Australia, and New Zealand...
What is the optimal duration of ADT in high-risk prostate cancer treated with RT+ADT?
Nabib et al. presented "Final Results" of the 18 vs. 36 month ADT trial for high-risk M0 prostate cancer in Chicago during ASCO 2017. This trial has the potential to be practice changing, since most men receive 2+ years of ADT during RT-ADT for high-risk disease. 630 patients were randomized and OS ...
When doing a tumor bed boost following whole breast irradiation, what do you typically use for CTV and PTV margin for photon and electron plans?
The optimal boost volume is unknown. Small differences in the size or placement of the boost seem unlikely to impact the risk of recurrence (1,2). Intrafraction motion of the excision cavity is small (3). My own practice is to give a total expansion of 15 mm around the excision cavity to create the ...
Is there any role for ctDNA testing after surgery or SBRT for Stage IB NSCLC to determine the need for adjuvant chemotherapy?
This is another emerging use for ctDNA that has shown promising results in small studies. The TRACERx consortium in the UK looked at the evolution of early NSCLC over time in 100 patients who underwent resection. They performed multi-region sampling and whole-exome sequencing and created patient-spe...
Under what circumstances would you consider low-dose radiation therapy for osteoarthritis in an older adult patient?
Here is a recent expert consensus by Joel Block on the use of low-dose radiation therapy in OA: Some highlights: "Placebo-controlled randomized clinical trials have now been reported using LDRT for OA of the knees and of the hands. Taken together, they do not show benefit beyond placebo... While a d...
Can bicalutamide be used instead of LHRH agonist in intermediate to high risk prostate patients receiving EBRT who want to preserve erectile function?
The short answer is yes, BUT with some serious reservations: 1. This is not considered standard of care in this patient population, so patients should be made aware of that fact and that conversation should be documented in the medical record; 2. There are data to indicate that bicalutamide plus EBR...
What is the preferred palliative regimen for elderly patients with rectal cancer who elect to forego surgery?
This is a question that comes up somewhat frequently and I don't believe really has a definitive answer. I myself have used multiple regimens in this situation. I think it really depends on the performance status and life expectancy of the particular patient. This is also a topic that may bring out ...