In what context would you most likely encounter the term "ancillary"?

The term "ancillary" refers to services, treatments, or measures that support or assist a primary service or treatment. In a healthcare context, ancillary services might include physical therapy, radiology, or laboratory services that provide additional support to the main treatment plan. These services are not primary treatments themselves, but they enhance or facilitate a patient's care, making them essential in a comprehensive approach to treatment.

By understanding the role of ancillary services, one can appreciate how important they are in ensuring effective patient care. They do not replace the main therapies or interventions, instead, they complement and support the overall healthcare strategy to improve patient outcomes. This clarification illuminates why "as a supportive measure" is the correct context for the term "ancillary."