| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 5.0 / 5 (6 reviews) | Pamplona, Spain | — | — | Sarcoma treatment, bone marrow transplant, limb preservation surgery, pediatric brain tumor removal | Pediatric sarcoma and brain tumors | Specializes in pediatric oncology with 74% cure rate for osteosarcoma. Uses unique Canadell technique to preserve limbs in 90% of cases. First in Spain to apply cell injections against glioblastoma. | Joint Commission International , European Society for Medical Oncology |