Which term indicates that something is occurring on the same side of the body?

The term that indicates something occurring on the same side of the body is "ipsilateral." This term is often used in medical terminology to describe structures, symptoms, or conditions that are situated on the same side of the body relative to a specific reference point. For instance, if a patient has a condition affecting the right arm and a related issue in the right leg, both are said to be ipsilateral to each other.

In contrast, terms like "contralateral" refer to something occurring on the opposite side of the body, which does not apply here. "Medial" describes a position that is closer to the midline of the body, while "lateral" refers to a position farther from the midline. Neither medial nor lateral indicates the same-sidedness that ipsilateral does, making it the correct choice for the question posed.