Overview
- Dahlmann said on Tuesday, June 16, 2026 that doctors at the University Hospital Bonn found a tumor in his liver after he reported worsening bile-duct symptoms.
- Medical teams plan surgery to remove the affected portion of his liver and likely his gallbladder, and the tumor was described by Dahlmann as detected at an early, potentially curable stage.
- He has canceled a scheduled World Cup moderation at the Robinson Club Camyuva in Turkey, putting his broadcast plans on hold while he focuses on treatment and recovery.
- Dahlmann attributes his multiple cancers to an inherited repair-gene defect and cites a family history of early gastrointestinal cancers in his father, grandfather and uncle.
- He went public to encourage others to get preventive screening, to offer encouragement to patients, and to highlight how inherited mismatch-repair defects can raise cancer risk and call for closer surveillance.