One of the primary gaps in cancer research is the limited understanding of cancer heterogeneity. Tumors are incredibly diverse, not only between different types of cancer but also within the same type. This diversity can affect how a patient responds to treatment. Unfortunately, many studies do not account for this variability, leading to generalized conclusions that may not apply to all patients.
Another significant gap is the lack of long-term studies. Cancer is a chronic disease, but many studies focus on short-term outcomes due to funding constraints and the urgency of finding immediate solutions. This short-term focus can obscure the long-term effects of treatments, including potential side effects and the likelihood of recurrence.