Benign tumours differ from malignant tumours in that benign tumours

1. Benign tumours remain confined to their original tissue and do not spread. 2. Malignant tumours (cancer) invade neighbouring tissues and can metastasise via blood/lymph. 3. Metastasis is the property of migrating and forming new tumours elsewhere. 4. Chemotherapy is one option; benign tumours often need only surgery or observation. _Source: syllabus Biology, Ch 7 "Human Health and Disease", §7.4_