What does the term "vesicle" refer to?

The term "vesicle" refers specifically to a blister-like lesion that is characterized by a small, fluid-filled sac on the surface of the skin or mucous membranes. These lesions typically contain clear fluid, which distinguishes them from other types of skin abnormalities. Vesicles can occur as a result of various conditions, including viral infections (like herpes simplex), allergic reactions, or friction.

In medical terminology, vesicles are defined by their fluid content and superficial formation, making them important in diagnostics for specific illnesses. Understanding this definition helps in recognizing the appearance and nature of vesicles in clinical practice, as well as noting their significance in various medical conditions.

The other options do not fit the definition of a vesicle. An abscess is a localized collection of pus, while a closed sac containing material could refer to various cysts or other structures but is not specifically indicating a blister. A specific kind of laceration relates more to a cut or tear in the skin rather than a fluid-filled lesion, which further clarifies the unique nature of a vesicle.