A tumor is a growing mass of abnormal cells. Give an example from this chapter of a benign tumor that becomes a malignant tumor.

Key Concepts

Benign vs. Malignant Tumors

Benign tumors are non-cancerous growths that do not invade nearby tissues or spread to other parts of the body. They typically grow slowly and are often encapsulated, making them easier to remove surgically. In contrast, malignant tumors are cancerous, characterized by uncontrolled cell growth, invasion of surrounding tissues, and the potential to metastasize, or spread, to distant sites.

Tumor Progression

Tumor progression refers to the process by which benign tumors can evolve into malignant tumors over time. This transformation often involves genetic mutations that enable the cells to acquire traits such as increased proliferation, resistance to cell death, and the ability to invade other tissues. Understanding this progression is crucial for cancer prevention and treatment strategies.

Examples of Tumors

An example of a benign tumor that can become malignant is a colorectal adenoma, which is a polyp in the colon. While initially benign, certain adenomas can undergo dysplastic changes and develop into colorectal cancer if not monitored or removed. This highlights the importance of regular screenings and early intervention in preventing the progression of benign tumors to malignancy.