text: Yo, check it out, I got a story to tell,
  'Bout a case that's rare, it's like a magic spell.
  An atraumatic arteriovenous fistula, you see,
  In the extracranial vertebral artery, it's a mystery.
  
  But wait, there's more, it ain't just that alone,
  An atraumatic aneurysm on the other side, it's grown.
  They reported this case, it's something unique,
  With excision of the fistulous lesion, so to speak.
  
  They tied up the vessel, both distal and proximal,
  To treat the condition, that's the protocol.
  Then something happened, it's really quite astounding,
  The contralateral aneurysm just started disappearing.
  
  Now, let me break it down, seven cases in sight,
  Of extracranial vertebral AV fistulae, that's right.
  Some were caused by trauma, others by dysplasia,
  But they all shared this rare vascular amazia.
  
  So there you have it, a tale of medical fame,
  A rap about science, it's not just a game.
  A case of atraumatic arteriovenous fistula,
  With an aneurysm, y'all, it's a medical thrill-a.