What is your approach for an intact patient who is found to have new concurrent superficial cortical brain and lumbar spine masses?

I assume by no deficits you mean the patient is asymptomatic. This sounds like metastatic disease. The first course of action for the asymptomatic, no-deficit patient is to do a metastatic evaluation, i.e., to search for the primary historical clues about what the primary could be; definitely a ches...

In our center, a colleague of mine specializes in spine onc and I specialize in brain metastasis; therefore, we decide on the best course of action and sequencing. It hasn't arisen yet that there were two simultaneous critical cranial and spine lesions; usually, one is higher priority than the other...