For brain metastases, what is the optimal time interval between surgery and post-operative SRS?  

There is no clear consensus on the optimal time interval between surgery and post-operative SRS. In practice, several factors would play a role in the timing of post-operative SRS. Notably, I would say rather than post-operative SRS, I would argue whether my intent is adjuvant SRS or salvage SRS, me...

Patients who have had a gross total resection of a solitary brain metastasis could be managed with MRI brain surveilance every 3 months reserving SRS for local recurrence in operative bed and or distant brain metastasis.