How do you approach treatment of a subtotally resected low grade glioma in a young patient?
Do molecular factors (1p/19q, IDH status) influence your choice of dose/volumes?
Answer from: Radiation Oncologist at Academic Institution
The management philosophy for LGG is radically shifting. For years, the belief was that these were essentially "incurable", slow-growing tumors, and hence the original debate centered around observation versus resection; the observation camp is now squarely in the minority. The debate th...
Answer from: Radiation Oncologist at Academic Institution
Given RTOG9802 showed OS benefit for RT/chemotherapy vs RT alone, which also included those with age <40 and STR, I would favor adjuvant RT AND chemotherapy (Buckner et al, NEJM 2016). Furthermore, there is this new diagnostic criteria based on CIMPACT-NOW consensus that low grade IDH-wildtype as...
Answer from: Radiation Oncologist at Academic Institution
Excellent discussion below. Given that the early vs. delayed XRT shows improvement in seizure-free survival, I think that earlier XRT is particularly beneficial for patients with seizures or large unresected or partially lesions that are already symptomatic. In my experience these large lesion...
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Radiation Oncologist at The Christie Hospital A really thorough discussion of the dilemmas faced...
Answer from: Radiation Oncologist at Academic Institution
In a young patient with a subtotally resected low grade glioma, I give the options of radiation therapy now vs at the time of symptomatic or imaging progression. In general, I favour delayed radiation therapy given the results of the European study that showed no change in survival outcomes. &...
Answer from: Radiation Oncologist at Community Practice
As stated above 9802 RT+PCV demonstrated survival advantage over RT alone which took years to see the OS benefit, implying a durable benefit to upfront treatment. So any high risk feature low grade glioma should be considered for adjuvant RT.
In terms of molecular factors, several excellent article...