The term "onco-" is commonly associated with which of the following?

The term "onco-" is derived from the Greek word "onkos," meaning mass or bulk, and is primarily used in medical terminology to refer to tumors. This prefix is often seen in terms related to oncology, which is the study and treatment of tumors and cancer. Using "onco-" signifies a relationship to tumor formation, progression, or treatment. Therefore, when a term includes "onco-," it is specifically indicating a focus on tumors, making it the most accurate choice among the options provided.

Understanding the significance of medical prefixes can greatly enhance comprehension in the field of health and medicine, particularly when studying conditions related to cancer and tumors.