text: Yo, check it out, let me break it down for you,
  We talkin' 'bout retinoids, lipids that ain't so new,
  Vitamin A, retinol, and analogues in the mix,
  They got multiple actions, causin' some crazy tricks.
  
  Cell proliferation, cell differentiation,
  Embryonic development, it's a whole formation,
  Each retinoid got its own pharmacologic game,
  Determinin' if it's useful in derm' or oncology, mane.
  
  Synthetic retinoids, they been synthesized,
  But they come with drawbacks, they ain't no surprise,
  Toxicity and teratogenicity, they bring the pain,
  So we gotta find better options, that's the aim.
  
  Some retinoids bind to receptors, not just one,
  Retinoic acid and retinoid X, they get it done,
  Hematologic malignancies, they show clinical activity,
  Genes for growth and differentiation, that's the key.
  
  Cutaneous T-cell lymphomas, they got a fight,
  Retinoid X receptor-specific rexinoids shine bright,
  But the mechanism of action, it's still unclear,
  Though they show efficacy, that much is clear.
  
  So there you have it, the scoop on retinoids,
  In the world of dermatology and oncology, they bring joy,
  Clinical relevance, compounds for the patients,
  Now you know the facts, no need for hesitations.