AP BIOLOGY

Detailed explanation-1: -Malignant tumors are cancerous (ie, they invade other sites). They spread to distant sites via the bloodstream or the lymphatic system. This spread is called metastasis. Metastasis can occur anywhere in the body and most commonly is found in the liver, lungs, brain, and bone.

Detailed explanation-2: -Malignant tumors are cancerous. They develop when cells grow uncontrollably. If the cells continue to grow and spread, the disease can become life threatening. Malignant tumors can grow quickly and spread to other parts of the body in a process called metastasis.

Detailed explanation-3: -A number of forces can cause gene mutations, such as smoking, radiation, viruses, cancer-causing chemicals (carcinogens), obesity, hormones, chronic inflammation and a lack of exercise.

Detailed explanation-4: -Malignant (Cancerous) Tumors For example, breast cancer begins in the breast tissue and may spread to lymph nodes in the armpit if it’s not caught early enough and treated. Once breast cancer has spread to the lymph nodes, the cancer cells can travel (metastasize) to the liver, bones, or other parts of the body.

Detailed explanation-5: -Thus, characteristics of malignant neoplasms include: More rapid increase in size. Less differentiation (or lack of differentiation, called anaplasia) Tendency to invade surrounding tissues.