What causes a tumor to grow rapidly?
If the cell learns how to block that, and it develops the ability to proliferate, tumors grow more rapidly.” Some of these mutations lead to rapid, unchecked growth, producing tumors that may spread quickly and damage nearby organs and tissue.
What type of tumor spreads dangerously and grows quickly?
Malignant brain tumors are cancerous. They typically grow rapidly and invade surrounding healthy brain structures. Brain cancer can be life-threatening due to the changes it causes to the vital structures of the brain.
What type of tumor grows fast?
Malignant tumors They can grow into nearby tissue, spread through the bloodstream or lymph system, and spread through the body. Malignant tumors tend to grow faster than benign tumors.
Do benign tumors have rapid growth?
Although benign tumors generally grow slowly, cases of fast-growing benign tumors have also been documented. Some malignant tumors are mostly non-metastatic such as in the case of basal cell carcinoma.
What is a medulloblastoma?
A medulloblastoma is a malignant pediatric brain tumor that arises in the cerebellum, a part of the brain located at the base of the skull.
How can you tell if a tumor is benign or malignant?
When the cells in the tumor are normal, it is benign. Something just went wrong, and they overgrew and produced a lump. When the cells are abnormal and can grow uncontrollably, they are cancerous cells, and the tumor is malignant.
How are cancerous tumors divided into broad groups?
A ________ biopsy is the aspiration of a core of tissue for microscopic examination. Cancerous tumors are divided into broad groups on the basis of the particular type of tissue from which the tumor cells arise.
How does a malignant tumor spread throughout the body?
A malignant tumor, however, is capable of both invading surrounding normal tissue and spreading throughout the body via the circulatory or lymphatic systems (metastasis). Only malignant tumors are properly referred to as cancers, and it is their ability to invade and metastasize that makes cancer so dangerous.
How are growth factors related to the development of cancer?
The growth factor requirements of many tumor cells are reduced compared to their normal counterparts, contributing to the unregulated proliferation of tumor cells both in vitro and in vivo. In some cases, cancer cells produce growth factors that stimulate their own proliferation (Figure 15.9).
How is the development of cancer a multistep process?
Cancer: Science and Society, New York: W. H. Freeman.) At the cellular level, the development of canceris viewed as a multistep process involving mutationand selection for cells with progressively increasing capacity for proliferation, survival, invasion, and metastasis(Figure 15.4).