What typically characterizes invasive tumors?

Invasive tumors are characterized by their ability to invade and destroy local tissues. This aggressive behavior is a hallmark of malignancy, where the tumor cells penetrate the surrounding normal tissue, disrupting its structure and function. This infiltration can lead to further complications, such as metastasis, where cancer cells spread to distant parts of the body.

In contrast, encapsulated tumors, typically benign, do not invade nearby tissues and are often contained within a defined boundary. Furthermore, while some tumors may grow slowly, invasive tumors are frequently associated with a more rapid growth rate. Lastly, the term "invasive" refers specifically to malignant growths, making the assertion that they are consistently non-cancerous categorically inaccurate. The destructive nature and local invasion are what make invasive tumors a significant concern in oncology and patient care.