What are tumors that are not extensively invasive classified as?

Tumors that are not extensively invasive are classified as benign tumors. These tumors exhibit limited growth and do not invade surrounding tissues or spread to distant sites in the body. Benign tumors often grow slowly, are typically well-circumscribed, and have distinct boundaries that make them easier to remove surgically.

In contrast, malignant tumors are characterized by their aggressive nature; they invade adjacent tissues and can metastasize, or spread, to other parts of the body. Neoplastic diseases pertain to a broader category encompassing both benign and malignant growths but do not specifically reference the invasiveness of tumors. Invasive neoplasms specifically refer to more aggressive tumors that have invaded surrounding tissues.

Understanding the distinctions between these classifications is critical in laboratory settings and clinical diagnostics, as it has significant implications for treatment approaches and patient prognosis.