Radiation Oncology
Expert insights on radiation treatment planning, techniques, toxicity management, and multimodal cancer care.
Recent Discussions
Do you consent patients for diabetes insipidus following SRS or fractionated radiation for pituitary tumors?
This, and more broadly hypopituitarism of any type, is an important consideration and likely under-addressed topic in consent.Untreated hypopituitarism in adult life is associated with reduced all-cause life expectancy, and by one study 2x mortality rate compared with age/sex matched controls. [1]Th...
Would you treat patient with early stage unfavorable classic Hodgkin lymphoma with 6 cycles instead of 4 cycles of Nivo-AVD to avoid mediastinal radiation in young female?
I would tailor the number of cycles to the clearance of PET positivity. If one is considering stopping at 4 cycles, I would do a PET scan after 2 cycles and only stop at 4 if it was negative. If it is positive after 2 cycles, I would repeat the PET scan after 4 cycles. If it is still positive, an al...
Which calculators, nomograms, or other resources, if any, do you use to help advise and prognosticate patients with newly diagnosed glioblastoma or other gliomas?
This is a rather difficult question to answer because prognosis in patients with glioblastoma (GBM) is best estimated by combining several clinical, molecular, radiographic, and treatment-related factors rather than relying on any single variable. Several validated prognostic models exist, but in cl...
Is multifocal disease an indication for RT in an elderly patient with early stage and otherwise favorable breast cancer?
Agree with above, though I did just see a healthy woman in her early 70s with a two site lumpectomy for two favorable small tumors. Though RT will not improve OS, I expect the cumulative risk for LR is likely higher for her (given the two sites have an independent risk for recurrence), and I leaned ...
How do you treat a focal pericardial metastasis?
In the era of oligometastatic disease, I understand the question. But an isolated event found at the pericardium is a stretch of concept. The issues of both the target and its physiological motion, and the presumably late cardiac injury, balance a choice of what’s best for the patient. How likely is...
How do you approach immediate management of paraspinal extramedullary hematopoiesis in patients with transfusion-dependent thalassemia when lesions are enlarging or causing neurologic symptoms?
In general, the goal of transfusion therapy in transfusion-dependent thalassemia (TDT) is to suppress ineffective erythropoiesis. It is the rationale for maintaining a higher pre-transfusion hemoglobin level, at 9.5-10.5 g/dl, well above the general threshold for PRBC transfusion used in oncology pa...
What total dose do you use for a close and positive breast cancer margin that cannot be re-excised?
Based on consensus guidelines, there is no such thing as a close margin as HR for recurrence did not change based on margin width. That was the reason for group to conclude that no tumor at inked margin is a negative margin (except for pure DCIS or those who had neoadjuvant chemo).If we give a boost...
What is your radiotherapy plan for stage IVA (cT4) cervical SCC with the tumor completely obliterating the bladder trigone?
I would follow the same schedule. After concurrent chemo RT, I would use HDR brachy with a hybrid applicator to achieve a D90 of 85 Gy or above to the HR-CTV and avoid any hotspot in the bladder wall. Part of the bladder wall in the trigone area receives a therapeutic dose.
Should special precautions be taken patients with Ehlers-Danlos syndrome receiving radiation therapy?
Not all EDS is the same. Most commonly, an EDS patient these days is a clinically diagnosed patient with hypermobile joints, possibly stretchy skin, and possibly chronic pain syndrome. That is a very different picture from vascular EDS with a COL3A1 mutation, which is rare and would have the extreme...
In a patient with inflammatory triple-positive breast cancer who has a pCR to neoadjuvant chemotherapy, but has an incidentally found focus of intermediate-grade ER+/PR+/HER2- ILC in the mastectomy specimen, how would this impact your adjuvant radiation recommendations?
This finding would not have any impact on my recommendations, since her management needs to be guided by the inflammatory breast cancer. That means chest wall plus nodal irradiation tailored to the findings of axillary surgery. There are no data on whether we can decrease the dose in patients with a...