Multiple choice Which among the following statements regarding benign tumors is false? Benign tumors cause mass effect. A benign tumor metastasises quickly. Tumors of endocrine tissues may overproduce certain hormones. Benign skin tumors are usually surgically ressected. Benign tumors are mostly well-differentiated. Reveal answer Fill a bubble to check yourself B Correct answer Explanation A benign tumor is a mass of cells (tumor) that lacks the ability to invade neighboring tissue or metastasize. These characteristics are required for a tumor to be defined as cancerous and therefore benign tumors are non-cancerous.