I have many swollen lymphs, lumbar puncture shows 19 oligolclonal bands, my IgG is high and my ACE in my blood is 119. I have had a previous dx of sarcoid neuro and pulmonary and still have all of the symptom without the evidence. Sarcoid in lungs is gone. New doc wants to rule out lymphoma but all of my lymph dissection was neg for leuk and lymphoma but is was black and necrotic. Can I have lymphoma without the positive biopsy?