Thanks for writing to us.
1. An involuntary loss of ~15% of weight is definitely something which should be evaluated. Moreover you have lymph
nodes which are increasing> both these features indicate some pathology which may be serious.
2. The clinical rule is that in the presence of undiagnosed disease and enlarged lymph nodes, biopsy
should be done rather than a fine needle aspiration, hence the decision of your PCM is in line with standard teaching.
Get evaluated at earliest.