How long do you wait after a GBM to radiate

[XRT_doc]

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We tend to start 2 weeks after but our neurosurgeons are feeling uncomfortable with us starting so early. How long do you wait to start radiotherapy after resection of a GBM?

 

[OTN]

3 weeks at the earliest.

 

[XRT_doc]

3 weeks at the earliest.

I meant we sim after 2 weeks, it takes us about a week between sim and start.

 

[medgator]

I meant we sim after 2 weeks, it takes us about a week between sim and start.

That's appropriate imo if the pt has not had resection but rather a biopsy. I think there is a jco article out there on the matter. If complete resection, I start at 4 weeks

 

[metallica81788]

That's appropriate imo if the pt has not had resection but rather a biopsy. I think there is a jco article out there on the matter. If complete resection, I start at 4 weeks

On this note and related...
Do people use this similar time frame when timing out Gamma Knife (or SRS) for brain met resection cavities?

 

[seper]

For GBM, we start as soon as staples are out. It's always > 2 weeks after surgery anyway, since IMRT planning takes time.
For SRS to resection cavity, we wait 4 weeks to let cavity "mature" on MRI.

 

[RADdagast]

Is this the article? http://jco.ascopubs.org/content/27/5/733.full.pdf "Short Delay in Initiation of Radiotherapy May Not Affect Outcome of Patients With Glioblastoma: A Secondary Analysis From the Radiation Therapy Oncology Group Database" JCO. Feb 10 2009