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Diekmeier Split Leaves Mother Solely Caring for Daughter With Progressive Cancer

The separation has placed daily medical management of 15-year-old Delani’s advancing kidney tumor on Dana Diekmeier, heightening pressure on the family and its future care plans.

Overview

  • Dana and Dennis Diekmeier announced their split in April 2026 after 16 years of marriage, and Dana says she now carries primary responsibility for their four children.
  • In an early June interview with RTL, Dana reported that 15-year-old Delani has an aggressive, reportedly incurable kidney tumor and that MRI scans taken every four weeks show ongoing tumor growth.
  • The illness and the breakup strained family bonds so severely that Delani briefly cut off contact with her father, a situation that recent reports say has started to improve.
  • Dennis has been reported to have a new partner and to see the children intermittently while Dana manages frequent hospital visits, appointments, and the practical needs of solo parenting.
  • Dana’s public appearances, including a F*ck Cancer charity run and a short cruise with Delani, have become moments of advocacy and an effort to focus on the children’s quality of life as medical uncertainty continues.