There are campaigns online to encourage Barbie manufacturer Mattel to make this happen. I'm picturing a regular Barbie wearing a pink gown, not a bald Barbie with one breast. I'm picturing a Barbie "not letting cancer defeat me" by wearing lots of make up and high heels.
I can't support a campaign for a Barbie with cancer because, given Barbie's long history of misrepresenting women and pandering to corporations, I am cynical that Barbie will realistically portray the experience of cancer and instead will fetishize it. It will be just another example of pink ribbon culture. Another opportunity to pink-wash little girls.
But if Barbie came out with a real cancer patient -- that feels strange to say -- I'd be all for it.
Children need to be able to identify with the toys they play with. Play therapy is also a good way to explain cancer to children and help them express their feelings about it.
Having said all this, we shouldn't define children, or anyone, by their cancer. It would be important to teach children that a Barbie with cancer is still a whole person whose needs exceed her cancer. She's not just a cancer patient: she needs to stimulate her intelligence; she loves to laugh; she's a mom and/or career woman and more.