Radiation Oncology
Expert insights on radiation treatment planning, techniques, toxicity management, and multimodal cancer care.
Recent Discussions
Is long term ADT now the standard of care with salvage prostate bed RT?
The dreaded hormone question...After 40 years of embarking on extremely well designed randomized trials, we still are confused about the who, what, when of ADT. Will RTOG 9601 create a new care standard? As @Dr. First Last said, I think we will see increased utilization. I have been using bicalutami...
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...
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...
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...
How do you approach treatment of a glioblastoma in pregnancy?
Glioblastoma during pregnancy could be treated safely (to mother and fetus) with certain precautions and modifications. Collaboration and consultation with the patient’s obstetrician are essential. External shielding over the patient’s abdomen during treatment will decrease the external scatter radi...
For stage III NSCLC treated with definitive intent chemoRT, how do you decide to proceed with surgery vs consolidation immunotherapy?
When we initially evaluate a patient with locally advanced NSCLC, we make the decision upfront about whether the patient will be managed surgically or not, and then we stick to that plan as long as everything proceeds as expected. So someone treated with definitive intent would get durvalumab (shown...
For patients with locally advanced rectal cancer who desire organ preservation and can tolerate fluoropyrimidine but not oxaliplatin, what is the appropriate treatment approach?
For patients with locally advanced rectal cancer who desire organ preservation and cannot tolerate oxaliplatin, the appropriate treatment approach would be neoadjuvant, long-course radiotherapy combined with fluoropyrimidine-based chemotherapy. After neoadjuvant treatment, patients are ev...
What are your typical dose and fractionaton schedules for post-prostatectomy radiotherapy for a patient with involved pelvic lymph nodes?
I'm just going to tell you what I do. :)I do sequential planning at 2 Gy per fraction - 46 Gy to the whole pelvis, and then a sequential conedown to treat the prostate bed to 20 Gy, 66 Gy cumulative. If nodes are pN+ but none are visible on CT imaging, that's my dose. If there are nodes on a post-op...
How do you dose or sequence therapy to overcome radioresistance from oligometastatic disease from RCC?
RAPPORT (NCT02855203) [Siva et al., PMID 34953600] was a phase I/II trial which used a combination of RT and pembrolizumab. RT was given with SBRT (20 Gy/1# prescribed to the 80% isodose line) or conventional radiotherapy (30 Gy/10#) when the treatment volume was in close proximity to a dose-limitin...
In a patient with high-risk cutaneous squamous cell carcinoma of the face with extracapsular extension after ipsilateral neck dissection and rapid contralateral cervical nodal recurrence, what is the optimal management?
In various published series, around half of patients fail to achieve a complete response to cemiplimab. From the clinical details, the current active area of disease appears to be the contralateral neck with no distant disease. Curative treatment is preferred. C-POST trial established surgery + adju...