A circumscribed elevation of the skin, 0.6 cm in diameter, filled with serous fluid on the cheek is most accurately documented as which term?

A circumscribed elevation of the skin, 0.6 cm in diameter, filled with serous fluid on the cheek is most accurately documented as which term?

• A. Vesicle
• B. Bulla
• C. Pustule
• D. Wheal

Answer: (A)

Fluid-filled skin elevations are categorized by size and contents. A vesicle is a circumscribed elevation filled with clear serous fluid and is typically less than 1 centimeter in diameter. Here, the lesion is 0.6 cm (6 mm) and contains serous fluid, which fits the vesicle description. A bulla would be 1 cm or larger, so that’s not a match. A pustule is filled with pus, not serous fluid. A wheal is a transient, edematous swelling often related to an allergic reaction, not a fluid-filled vesicle.

Fluid-filled skin elevations are categorized by size and contents. A vesicle is a circumscribed elevation filled with clear serous fluid and is typically less than 1 centimeter in diameter. Here, the lesion is 0.6 cm (6 mm) and contains serous fluid, which fits the vesicle description. A bulla would be 1 cm or larger, so that’s not a match. A pustule is filled with pus, not serous fluid. A wheal is a transient, edematous swelling often related to an allergic reaction, not a fluid-filled vesicle.