A tumor is

A tumor is

• A. A mass of abnormal cells
• B. A cancerous growth that spreads quickly
• C. A benign tissue growth
• D. An infectious disease

Answer: (A)

A tumor is a mass formed when cells begin to grow in an unregulated, abnormal way. This definition captures the general idea that a tumor is a lump of abnormal cells. It’s important to note that not all tumors are cancerous: some are benign and stay localized, while others are malignant and can invade surrounding tissues and sometimes spread to other parts of the body. An infectious disease is caused by a pathogen like a bacteria or virus, not by uncontrolled cell growth, so it doesn’t describe what a tumor is.

A tumor is a mass formed when cells begin to grow in an unregulated, abnormal way. This definition captures the general idea that a tumor is a lump of abnormal cells. It’s important to note that not all tumors are cancerous: some are benign and stay localized, while others are malignant and can invade surrounding tissues and sometimes spread to other parts of the body. An infectious disease is caused by a pathogen like a bacteria or virus, not by uncontrolled cell growth, so it doesn’t describe what a tumor is.