While being prepared for a biopsy of a lump in the right breast, the patient asks the nurse what the difference is between a benign tumor and a malignant tumor. The nurse explains that a benign tumor differs from a malignant tumor in that benign tumors

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The major difference between benign and malignant tumors is that malignant tumors invade adjacent tissues and spread to distant tissues and benign tumors never metastasize. Both types of tumors may cause damage to adjacent tissues. The cells differ from normal in both benign and malignant tumors. Benign tumors usually do not recur.

While Being Prepared for a Biopsy of a Lump in the Right