What characterizes inflammatory lesions?

Inflammatory lesions are primarily characterized by a predominance of leukocytes, or white blood cells. These cells are crucial components of the immune response and play a vital role in the body's defense against infection and tissue injury. During an inflammatory response, there is an increase in the number of leukocytes, as they migrate to the site of injury or infection to help eliminate pathogens, clear out damaged cells, and initiate healing processes.

Leukocytes can include various types, such as neutrophils, lymphocytes, monocytes, and eosinophils, each having specific functions during inflammation. The presence and types of leukocytes can indicate whether the inflammation is acute or chronic, and can provide insights into the underlying causes of the inflammatory process.

In contrast, other options refer to different elements that do not consistently characterize inflammatory lesions. For instance, while necrotic tissue may accompany inflammation, it does not define it. Similarly, a predominance of erythrocytes (red blood cells) is more associated with hemorrhagic conditions rather than inflammation, and fibroblasts are primarily involved in the healing phase rather than the initial inflammatory response. Thus, the presence of leukocytes is a hallmark of inflammatory lesions and is critical for understanding the body's response