text: Yo, check it out, I got a story to tell
  'Bout plasma cell-free DNA, let me cast the spell
  It's the soluble DNA, found up in your plasma
  Tumor-derived DNA, with mutations, no chasma
  
  We studyin' the properties, comparin' DNA
  Plasma cell-free versus biopsy, what can we say?
  We tryna evaluate IgH and TCRγ
  Gene rearrangement in non-Hodgkin's Lymphoma, you see
  
  360 samples, that's the number we got
  Amplifyin' IgH and TCRγ, we on the spot
  PCR doin' its thing, gettin' the results
  Comparin' plasma cell-free with biopsy, no insults
  
  288 cases, we got DNA extracted
  Newly diagnosed, refractory, relapsed, impacted
  But 72 patients, nothin' found, they remittent
  Positive percentages, let me give you the sentiment
  
  B-NHL patients, IgH rearrangement in sight
  81% in plasma cell-free, biopsy's DNA tight
  No significant difference, that's what we found
  P-value greater than 0.05, let it resound
  
  Now T-NHL patients, let's talk about the stats
  44% in plasma, 39% in biopsy, no cracks
  Again, no significant difference, that's a fact
  P-value greater than 0.05, no need to backtrack
  
  Tumor-derived DNA, detectable, no doubt
  In tumor-loaded plasma, we find it out
  For NHL patients, this discovery's key
  Detectin' gene rearrangement, plasma DNA's the spree
  
  Clinical significance, just like biopsy's DNA
  But it's simpler, more convenient, non-invasive, okay?
  Plasma cell-free DNA, it's the future, believe
  In the world of non-Hodgkin's Lymphoma, we achieve