| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 5.0 / 5 (3) | Madrid, Spain | 76+ years | PET/CT, Consultation with a surgeon | — | — | Joint Commission International , International Organization for Standardization | ||
| #2 | 3.6 / 5 | Goyang, Republic of Korea | — | — | PET/CT, Colonoscopy | — | — | Advanced Regenerative Medicine Implementation Institution (Ministry of Health and Welfare, Republic of Korea) | |
| #3 | — / 5 | Wuppertal, Germany | 25+ years | CT (computer tomography), MRI of one area | — | — | International Accreditation System for Interventional Oncology Services (IASIOS), German Cancer Society |