Which term refers to a method for diagnosing disorders with non-unique symptoms?

The method for diagnosing disorders that present with non-unique symptoms is known as differential diagnosis. This approach involves distinguishing between two or more conditions that share similar signs or symptoms. It is particularly important in clinical settings where patients may exhibit overlapping clinical features, making it challenging to identify the exact disorder.

Differential diagnosis typically requires a thorough evaluation of a patient's history, physical examination, and possibly additional diagnostic tests. By considering several possible conditions, healthcare providers can systematically eliminate or confirm diagnoses, leading to more accurate treatment plans.

Other terms in the options have distinct meanings. Clinical diagnosis refers to the identification of a condition based on clinical signs and symptoms without extensive testing. Prognosis relates to predicting the likely course and outcome of a disease. Etiology deals with the cause or origin of a disease. Each of these terms serves a specific function in the medical field, but they do not encompass the process of distinguishing between conditions with similar presentations, which is the core of differential diagnosis.