Doctors say her struggle - even with the best care as a member of a prominent family - emphasises the need for more research.

Former President John F. Kennedy was one of nine siblings, so, yes, his family is huge. We're breaking down how Maria Shriver, Tatiana Schlossberg, Jack Schlossberg and countless Kennedys are related.

Maria Shriver, Meghan McCain and more shared their support for Tatiana Schlossberg after she revealed her terminal cancer diagnosis.

The mother of Ronan Thompson, who inspired Taylor Swift’s track “Ronan,” penned an emotional online tribute to Tatiana Schlossberg. Maya Thompson, whose blog detailed her late son’s battle with neuroblastoma and moved Swift,