Tumor, swollen, medical lexicon, learn online


Definition tumor

also known as: tumor

tumor A tumor arises from a sudden onset of abnormal proliferation of individual cells of the body, such as epithelial cells, which form the most superficial layers of the skin and all the mucous membranes of the body and from which all glandular organs are built, or one of those multifaceted connective tissue cells that fill everywhere in the tissues of the body – or supporting substance can be found. So suddenly a cell – for example, from the muscles of the uterus – to divide and divide again, and all the resulting “daughter cells” do the same again and again, until finally a muscle tumor of the uterus, a fibroid, which is too significant Size (and to a weight of several pounds) can grow. Or one of those countless many epithelial cells, which form the mirror-like surface of the gastric mucosa like closely packed mosaic stones, one day begins to divide and multiply just as indefinitely for a hitherto unknown reason: a tumor of gastric epithelial cells, a stomach cancer (Krebs ). Depending on the “mother cell”, from which a tumor emerged, one speaks of muscle tumor (myoma), neuralgia (neuroma), glandular tumor (adenoma), adipose tissue (lipoma), benign epithelial cell tumor (polyp) and malignant epithelial cell tumor ( Carcinoma), benign connective tissue tumor (fibroid) and malignant connective tissue tumor (sarcoma), bone tumor (osteoma), etc. For example, since a malignant epithelial cell tumor may emanate from all organs lined or composed of such cells, there is a stomach , Bladder, Tongue Carcinoma, etc. The same distinction applies to the other types of tumors.

For any tumor-related consideration, the difference between benign and malignant tumors is fundamental: a benign tumor is a tumor composed of a large number of cells, and over time increases in size It can increase in size and ultimately affect the organs of its environment, but basically is not much more than a kind of disturbing foreign body. This is of course only to be understood in principle; Because in individual cases, a benign tumor for its impact on the affected person can have a very adverse effect: for example, if it arises in the brain (brain tumor) and here by the pressure it exerts on the surrounding nerve tissue, causing serious damage, or if due to a benign uterine tumor (a fibroid) repeatedly comes to violent bleeding, so that the affected woman is increasingly blood poorer. In contrast to the – in principle – “benign” tumors, there are the “malignant” ones who prove this malignancy by not simply pressing them, like the benign ones, by enlarging them on the neighboring tissues and possibly pushing them to the side, but into them grow into it and gradually destroy it. This “infiltrating” growth constitutes one of the characteristic features of malignant tumors. The second is their tendency to allow “offshoots” to pass into the blood or lymph stream for transport to distant organs, where they then settle and form again cancerous tumors, so-called metastases, which, as well as ” Parasite «, destructively infiltrating into its environment. The most important example of a malignant tumor is epithelial cell carcinoma, usually referred to as cancer. If malignant tissue growths are not recognized immediately in the initial stage and consistently fought, d. H. removed as completely as possible, they often lead to death. Not infrequently, they originate from originally innocuous changes that suddenly become malignant and are therefore referred to as precancerous lesions or precancerous conditions.

By contrast, the time factor does not generally play such a decisive role in the successful treatment of a benign tumor because this tumor does not grow destructively into its environment and does not bring with it the danger of the formation of secondary tumors. It is and remains a local tumor formation. Medical treatment – generally a relatively simple surgical remedy – requires it only if the growth of the surrounding tissues and organs are pressed and thereby damaged or if other disabilities, such. As excessive bleeding occur.


Photo: Big_Liver_Tumor by haitham alfalah, CC-BY-SA-3.0

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