What does the suffix '-sis' signify in the context of medical terminology?

In medical terminology, the suffix "-sis" is commonly used to denote a state or condition, which aligns perfectly with the correct answer. This suffix indicates a process or a condition, often referring to a pathological process or abnormal state in relation to a disease or medical situation.

For example, the term "osis" in "neurosis" signifies a condition associated with the nervous system. This conveys that "-sis" plays a key role in understanding the nature of medical terms related to states or conditions within the human body, emphasizing the physiological or pathological aspect.

The other options do not capture the essence of what "-sis" represents. While "infection" pertains to the presence of pathogens, "structure" relates to anatomy, and "treatment" indicates intervention, none of these terms encompass the specific definition provided by "-sis" in a medical context. This distinction helps to clarify the terminology used in healthcare documentation and coding practices.