What does the suffix "-iasis" indicate?

The suffix "-iasis" is used in medical terminology to indicate the presence of a condition, particularly an abnormal condition or disease that is usually chronic. This suffix often denotes a pathological state, such as in the terms "psoriasis" or "lithiasis," referring to skin conditions and the presence of stones, respectively. Understanding this suffix is essential for interpreting medical terms, as it helps to clarify the nature of the condition being described. Recognizing that "-iasis" signifies the existence of a disease or disorder aids healthcare professionals in diagnosing and discussing various medical conditions accurately.