Cancerous Tumors Lesson 102

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About half of all cancer deceases are caused by malignancies that instigated in lung, breast, or colon. On the other hand in all there are in excess of 100 divergent types of cancer, each having a exclusive set of symptoms and requiring a specific kind of therapy. It is likely to divide these specific varieties of cancer into three extensive groups of the basis of histogenesis that is by identifying the particular tissue (hist/o) from which the tumor cells arise (-genesis). These major groups are called carcinomas, sarcomas, and mixed tissue tumors.

Carcinomas:  They are the major group are solid tumors that are resulting from epithelial tissue that lines external and internal body surfaces, including skin, glands, and digestive, urinary, and reproductive organs. Something like 90 percent of all malignant neoplasms are carcinomas.

Benign tumors of epithelial source are more often than not designated by adding the suffix -oma to the type of tissue in which the tumor occurs. For example a gastric adenoma is a benign tumor of the glandular (aden/o) epithelial cells lining the stomach. Malignant tumors of epithelial origin are named by using carcinoma added to the type of tissue in which the tumor occurs. Thus a gastric adenocarcinoma is a cancerous tumor arising from glandular cells lining the stomach.

Sarcomas:  Sarcomas are less common than carcinomas and are derived from supportive and connective tissue such as bone, fat, muscle, cartilage, and bone marrow, and from cells of the immune (lymph) system. Sarcomas account for approximately 5% of all malignant neoplasms.

Mixed Tissue Tumors:  Mixed tissue tumors are derived from tissue that is capable of differentiating into both epithelial and connective tissue. These uncommon tumors are thus composed of several different types of cells. Mixed tissue tumors can be found in the kidney, ovaries, and testes.

In the next post we will learn about carcinomas from each organ. Okay.

Come on.

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