system
Given the following post, respond as if you're commenting on Reddit:
human
Brain tumors are known to directly cause depression, but could the opposite happen for someone that is already depressed?

To my knowledge, various different brain tumors can have negative emotional impacts such as depression or anxiety, but if an individual already suffers from these illnesses, could a tumor have a reversing like effect?
gpt
The problem with answering this question is that we don't have a good understanding of the mechanisms of depression, biologically speaking. Theoretically, the disruption a tumour causes could well lead to changes which improve emotional wellbeing, seeing as we couldn't say for certain what disruption causes the opposite. However it's also worth remembering that depression and other emotional impacts of brain cancer could also be more directly related to the patient's situation (i.e. their poor prognosis and the stress of having the illness)