What is a common feature of both benign and malignant tumors?

Both benign and malignant tumors share the characteristic of consisting of abnormal cells. This feature underscores the fundamental difference between normal cells and tumor cells, which arise due to uncontrolled cell growth and division. In both cases, the cellular changes result in a mass or lesion, which can disrupt normal tissue function.

Benign tumors, while not cancerous, can still be made up of atypical cells that differ from surrounding normal tissue. Although they generally grow slowly and do not invade nearby tissues or metastasize, they can still present issues based on their size or location. On the other hand, malignant tumors are characterized by their ability to invade other tissues, metastasize to distant sites, and cause serious health issues.

The other options do not accurately describe a feature shared by both tumor types. For instance, while benign tumors are non-cancerous, malignant tumors are cancerous. The ease of treatment can vary greatly based on the tumor type and its stage, making this a misleading generalization. Additionally, tumors can develop in various organs and are not restricted to specific ones, which contradicts the suggestion that both types are only found in certain organs. Thus, the correct interpretation is that both benign and malignant tumors consist of abnormal cells, which is a fundamental aspect