What prefix is typically used before terms referring to glandular structures?

The prefix "aden" is commonly used in medical terminology to refer specifically to glandular structures. This prefix derives from the Greek word "adenos," which means gland. In medical contexts, terms such as "adenoma" (a benign tumor of glandular origin) or "adenitis" (inflammation of a gland) illustrate the use of this prefix in identifying conditions related to glands.

In contrast, "glyco" refers to sugars or carbohydrates, as seen in terms like "glycolysis." "Cisto" relates to cysts or bladder structures, as in "cystoscopy," which involves examining the bladder. "Itis" indicates inflammation and is used in terms like "appendicitis," which refers to inflammation of the appendix. Each of these prefixes identifies different anatomical or pathological contexts, making "aden" the correct choice for glandular structures.