The paper -
A spatial model predicts that dispersal and cell turnover limit intratumour heterogeneitycan be found here: http://www.nature.com/nature/journal/v525/n7568/full/nature14971.html
It is a spatial cellular automaton model (beautifully visualized) that looks at cancer growth and migration in a 3-d spatial context. The authors did a good job citing appopriate work (>100 citations) and never made any claims that were over the top. The press release, however... well... I'll let the twitter backlash speak.
I think the most striking thing about all of this was the the senior author, Martin Nowak, one of the fathers of evolutionary dynamics and most successful mathematical biologists in the world, came on to twitter to apologize for the Press Release (see final tweet). Class move.
At the end of the day, we have little control of the press releases for our papers. And, while we certainly all want to see our work publicized (how else can people find out about it?), seeing good work cheapened in some way by an oversold press release doesn't help anyone.
Anyways, here is a tour of spatial models of cancer, twitter style. #notthe1sttime