Milo, 17, is the first patient in the world to fully defeat a so-called “solid tumor” using a new type of immunotherapy. The German teenager had been battling cancer for ten years.
Initially, the adolescent was diagnosed with a malignant kidney tumor. Later, despite surgical intervention and chemotherapy, metastases spread to the liver, spleen, lungs, and brain.
Milo’s last chance proved to be an experimental therapy conducted at the Hopp Children’s Cancer Center Heidelberg (KiTZ). Scientists discovered that the teenager’s tumor cells contained a specific protein, which allowed doctors to “train” the patient’s own immune cells—T-lymphocytes—to recognize and destroy this protein.
The treatment process involved several stages:
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Extraction of immune cells from the teenager’s blood;
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Genetic modification of these cells under laboratory conditions;
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Reintroduction of the modified cells into the body via infusion.
Just 12 days after the infusion, an MRI scan confirmed the disappearance of tumor foci, and after 120 days, living tumor cells had completely vanished from his body.
Doctors emphasize that this therapy is a revolutionary achievement in pediatric oncology. Until now, similar immunotherapies were used to treat leukemia; this marks the first time the method has been successfully applied against solid tissue tumors.
According to specialists, pediatric cancers are biologically different from adult cancers; they contain fewer mutations, which makes many traditional drugs less effective in adolescents. Milo’s case proved that with an individualized genetic approach, even the most aggressive forms of the disease can be defeated.
Milo, who is passionate about mountain biking, returned to training shortly after completing the therapy. Now, he dreams of finishing school and studying medicine in Heidelberg to become a doctor himself.
Although pediatric oncology cases are relatively rare (approximately 2,000 cases per year in Germany), cancer remains the second leading cause of death among adolescents, further highlighting the vital importance of such research.
