What is the classification of lesions that are raised and may be solid or fluid-filled?

The classification of lesions that are raised and may be solid or fluid-filled is considered primary lesions. Primary lesions are directly associated with the initial change in skin structure and appearance, typically presenting as the first signs of a skin condition or disorder. Examples of primary lesions include papules, pustules, and vesicles, showcasing their raised nature and ability to be fluid-filled or solid.

In contrast, secondary lesions derive from primary lesions or as a result of external factors, such as infections or injuries, and can include scars or crusts. Vascular lesions refer specifically to those lesions that involve blood vessels, often appearing as red or purple marks on the skin, such as angiomas or petechiae, and may not necessarily fit the description of being solid or fluid-filled in the same way primary lesions do. Infectious lesions are defined based on their source being pathogenic organisms and are not categorized by their physical characteristics like being raised or filled. Thus, primary lesions accurately represent the type of raised lesions described in the question.