"The worst experience": The experience of grandparents who have a grandchild with cancer.

This study explored the experience of eight grandparents having a grandchild diagnosed with cancer. Semi-structured interviews, both with individuals and couples, were used to gain a better understanding of the meaning these grandparents give to this experience. A thematic analysis based on Giorgi's (1997) phenomenological method highlighted three central themes: "Living the worst experience", "Having to support: A crucial role for grandparents", "To feel supported to better carry on." The results of this study can contribute to enhancing the quality of care for grandparents affected by their grandchild's cancer.