My sister was diagnosed either an aggressive stage four lymphoma cancer and died three weeks later what do you think went wrong?

Right vs. wrong: There is usually no right vs. wrong in getting cancer or in dying from cancer. The exception would be if something man-made was the major cause of the cancer. Things that are known to cause various cancers include tobacco, asbestos, excessive sun exposure, ionizing radiation, etc. If there is a story to this case, as there usually is, one can try HealthTap Concierge Oncology, our premium service.