text: Yo, check it out, listen up, here's the deal,
  We talkin' 'bout myeloid sarcoma, it's for real.
  An extramedullary mass, made of cells, no doubt,
  Immature myeloid cells, that's what it's all about.
  
  Acute myeloid leukemia, it's a rare display,
  But this manifestation, it don't play.
  In the pediatric testicular case, it's a challenge, see,
  Few cases reported, in the literature, you'll agree.
  
  Now let me tell you 'bout these 5 cases we found,
  Pediatric testicular MS, we held 'em down.
  Morphologic and immunohistochemical, we went deep,
  Correlating with KMT2A (MLL), that's how we keep.
  
  Three patients had no prior leukemia history,
  But all 5 showed monoblastic morphology.
  CD33, CD43, CD68, CD163, they're all there,
  CD4 (dim), lysozyme, these markers we share.
  
  But hold up, CD10, CD34, CD117, they're negative, man,
  Myeloperoxidase too, that's not in the plan.
  KMT2A (MLL) rearrangement, we found in 4 outta 5,
  It's a key player in this jive.
  
  In the literature, 8 more cases were seen,
  Pediatric testicular lymphoma, quite a scene.
  Monocytic differentiation, that's what they showed,
  And 3 of 'em had KMT2A (MLL) in the code.
  
  So to sum it up, here's what we found,
  Testicular MS in kids, it's monoblastic all around.
  KMT2A (MLL) rearrangement plays a part,
  And an extended immunohistochemistry panel, it's smart.
  
  That's the scoop, hope you got it all straight,
  Myeloid sarcoma and rap, a perfect date.
  Remember this knowledge, let it sink in,
  Stay informed, keep learning, that's how we win.