@juandugo it can be very frustrating to attempt to find a medical professional who is supportive of many complementary therapies for cancer. They can only support therapy with a proven track record for success without debilitating side effects. Keep searching and use the internet wisely for information. Know that there are anecdotal reports of treatment success everywhere, but not always supported by research and safe studies.
I am a veterinarian and Fenbendazole is a commonly used drug with benefits in veterinary medicine. It's use in humans is experimental and safety and side effects are likely not well understood at this time. Be careful.