Which of the following about primary and metastatic tumors is true? Primary tumo

Question

Which of the following about primary and metastatic tumors is true? Primary tumors typically impact organ function once they contain about 10^7 cells. Primary tumors are more likely to be detected when still small if they are found in the peritoneal space. Astrocytomas are particularly prone to producing metastases. 90% of cancer deaths are due to metastases, not primary tumors. Which of the following statements about epithelial tumors is true? Tumors of the epithelium are called sarcomas Benign epithelial tumors can't initiate angiogenesis Tumors of the epithelium represent nearly 50% of life-threatening cancers. Epithelial tumors are considered benign if they are contained on the epithelial side of the basement membrane. Which of the following is a major challenge for tumor cell survival during early invasion/metastasis? Detachment from the extracellular matrix can cause death by anoikis. Growth factors in the circulation can cause apoptosis. Hydrodynamic shear In the stroma can tear tumor cells apart. Association with platelets can reduce the viability of tumor cells within the large vessels of the venous system.

Explanation / Answer

Question 1

Which of the following about primary and metastatic tumors is true

90% of cancer deaths are due metastases not primary tumors

Question 2

Which of the following statements about epithelia tumors is true?

Begin epithelial tumors can’t initiate angiogenesis

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Question 3

detachment from extracellular matrix can cause death by anoikis

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Metastasis is the spread of a tumor or other ailment from one organ or some portion of the body to another without being specifically associated with it. The new events of malady along these lines produced are alluded to as metastases (mets).

Disease happens after a solitary cell in a tissue is dynamically hereditarily harmed to create cells with uncontrolled expansion. This uncontrolled expansion by mitosis delivers an essential heterogeneic tumor. The cells which constitute the tumor in the long run experience metaplasia, trailed by dysplasia then anaplasia, bringing about a dangerous phenotype. This danger takes into account attack into the dissemination, trailed by intrusion to a moment site for tumorigenesis

benign tumor :it is a mass of cells (tumor) that does not have the capacity to attack neighboring tissue or metastasize. These qualities are required for a tumor to be characterized as malignant and in this manner benevolent tumors are non-dangerous. Likewise, kindhearted tumors for the most part have a slower development rate than threatening tumors and the tumor cells are typically more separated (cells have ordinary components). Kind tumors are normally encompassed by an external surface (sinewy sheath of connective tissue) or stay with the epithelium. Basic cases of kindhearted tumors incorporate moles and uterine fibroids.

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