Radiation Oncology
Expert insights on radiation treatment planning, techniques, toxicity management, and multimodal cancer care.
Recent Discussions
In a patient with locally advanced rectal cancer, T3N1, who has undergone diverting sigmoid colostomy due to symptomatic obstruction, when do you start radiation following surgery?
Typically, the blind end of the sigmoid colon can be avoided, especially with IMRT. In general, the surgeon should understand that and should not leave it in your volume. As long as that is the case, you can start as soon as the patient feels well enough for treatment positioning (upon discharge, ev...
Would you continue cemiplimab adjuvantly, following resection of initially unresectable cutaneous squamous cell carcinoma treated with downstaging immunotherapy?
This is a challenging question because, as you know, we have no randomized data to address it. I generally do not continue immune checkpoint therapy after resection of SCC skin. However, given the adjuvant data in melanoma and the high efficacy of anti-PD1 in skin SCC, I do think it is reasonable to...
Would you consider the thymus as an OAR during treatment planning for advanced NSCLC?
With any avoidance, the dose is pushed further somewhere else, with often unclear effects. You really can rob Peter to pay Paul. I reckon that, as automated, AI-guided OAR contouring occurs, many substructures can be feasibly and reliably drawn and then monitored for associated late effects. It is g...
Do you recommend placement of a rectal spacer when delivering radiotherapy to the prostate in patients with oligometastatic prostate cancer?
No. I have had a few patients seek it out on their own, which is fine. But I tell them it is not necessary.
Given the recently published results of PEACE 2, under what scenario would you offer pelvic radiotherapy for high-risk/very high-risk prostate cancer?
Although PEACE-2 was presented at GU ASCO, to my knowledge it has not yet been published other than in abstract form, and the results of the arms in PEACE-2 comparing prostate only vs whole pelvic RT were not presented, so I don't think PEACE-2 sheds any light yet on the question of whether or not t...
When should you use single-fraction radiotherapy for spinal cord compression?
The SCORAD III trial is practice changing. But I do NOT plan to treat ALL patients with spinal cord compression with a single fraction of 8 Gy now. Here is why: SCORAD III is extremely important new study for the management of metastatic epidural spinal cord compression (MESCC) for patients with sho...
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...
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...
When treating the whole brain with hippocampal avoidance, do you ever deliver SIB to gross disease?
There have been several papers and an ongoing trial evaluating the safety and efficacy of including SIB to macrometastatic disease with HA-WBRT. A recently published trial from the UT-Southwestern team was a single-arm phase II trial, which treated 50 brain metastasis patients with HA-WBRT to 20 Gy ...
Are there select patients with rectal cancer where radiation field size reduction might be feasible?
Yes, however, how to select which patients could have a field size reduction is unknown. Such a field size reduction is probably even more acceptable in the era of total neoadjuvant therapy, however, this cannot be considered standard of care given the absence of trials evaluating such novel approac...