text: Yo, listen up, I got some knowledge to drop,
  About the immune system and cancer, don't you stop.
  Advances in understanding, it's a breakthrough,
  Cancer immunotherapies, yeah, they're something new.
  
  Melanomas and lung cancer, they got the spotlight,
  Immunotherapy success, man, it shines so bright.
  But most patients ain't getting the benefit, it's true,
  Tumor microenvironment, immune evasion, they're the issue.
  
  FDA approved some treatments, but it's limited in scope,
  Only bevacizumab for ovarian cancer, giving hope.
  Immunotherapeutic strategies, they're still in the works,
  Clinical trials testing, seeing what really works.
  
  We need to understand the cancer-immune interaction,
  To optimize therapies, that's the main attraction.
  Whether it's immunotherapy alone or with chemo,
  We gotta study it all, so we can win the battle, yo.
  
  This article's got two parts, let me break it down,
  First, the immune system and tumor, they're in town.
  Second, strategies and targets, challenges we face,
  Cancer immunotherapy, with focus on ovarian case.