<s>[INST] My 75 year old friend with a history of a non malignant brain tumor that was removed 10 or 12 years ago, now is experiencing severe depression. In last few weeks, he can no longer walk without a walker and a nurse holding him. His medical staff say it is due to depression. Is that a symptom of depression? Or should a recurrence of his brain tumor be pursued? Bette Forberg. YYYY@YYYY [/INST] DearWe understand your concernsI went through your details. Your friend is already 75. There is a sort of depression which comes when people get old. The depression which affects physical mobility and mood. Such symptoms can be called psycho-somatic symptoms. This depression could be psycho-somatic. I do suggest you to consult your neurologist for evaluation.If you require more of my help in this aspect, please use this URL.  Make sure that you include every minute detail possible. Hope this answers your query.  Further clarifications are welcome.Good luck. Take care. </s>