OSMT (Ontario Society of Medical Technologists) Practice Exam

A pustule is defined as a small, raised area of the skin that contains cloudy fluid, which usually consists of pus. This formation is commonly associated with inflammatory responses to infections or irritations, resulting in the accumulation of white blood cells, dead tissue, and other components in the fluid, giving it a cloudy appearance. The other described conditions do not match the definition of a pustule. A small flat red area of the skin refers to a macule, while a small raised area of the skin without any mention of fluid would be classified as a papule. Lastly, a small raised area of the skin containing clear fluid would describe a vesicle rather than a pustule. Thus, the definition aligns with option D, as it correctly characterizes the nature of a pustule.