text: Yo, check it out, I'm 'bout to drop some knowledge,
  Talkin' 'bout a condition called membranous fat necrosis,
  It's a degenerative process that affects adipose tissue,
  With membranocystic lesions, that's the issue.
  
  These lesions, they be cysts, different shapes and sizes,
  Lined by a crenulated membrane, so precise,
  They got a staining property, like ceroid,
  But the pathogenesis, man, it's still unknown, avoid.
  
  Some say it's ischemic, that's been the closest guess,
  Atherosclerosis and venous insufficiency, causing distress,
  Due to large and medium vessel disease, that's the main cause,
  But vasculitis has been mentioned, let me pause.
  
  See, vasculitis ain't been proven in this situation,
  No tissue sections showin' that association,
  But hold up, I got some cases to present,
  Uncommon causes of vasculitis, let's represent.
  
  First up, granulomatous vasculitis with a zosteriform scar,
  Post-herpetic and MFN, that's bizarre,
  Then we got cytomegalovirus-induced vasculitis,
  In a patient with systemic lupus erythematosus, that's the gist.
  
  Last but not least, lymphocytic vasculitis in an immunization site,
  Tetanus toxoid reaction, man, it don't seem right,
  These cases showin' MFN with unique triggers,
  Expanding our knowledge, breakin' down the figures.
  
  So there you have it, the lowdown on MFN,
  A rap version of medical knowledge, my friend,
  Remember, keep it real and stay in the know,
  Hip-hop and medicine, that's how we flow.