Manjul Tiwari Tumor Marker & Carcinogenesis 9788792329370

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Автор: Manjul Tiwari
Название: Tumor Marker & Carcinogenesis
ISBN: 9788792329370
Издательство: Taylor&Francis
Классификация:

Онкология

Стоматология / медицина полости рта и челюстно-лицевая медицина

Биомедицинская техника

Преодоление болезней и особых состояний

ISBN-10: 8792329373
Обложка/Формат: Paperback
Страницы: 164
Вес: 0.24 кг.
Дата издания: 30.10.2012
Язык: English
Размер: 234 x 156 x 9
Читательская аудитория: General (us: trade)
Ключевые слова: Oncology,Dentistry,Biomedical engineering, HEALTH & FITNESS / Diseases / Cancer,MEDICAL / Dentistry / General
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Поставляется из: Европейский союз
Описание: Cancer may be regarded as a group of diseases characterized by an abnormal growth of cells, an ability to invade adjacent tissue and even distant organs, and the eventual death of the affected patient if the tumor has progressed beyond that stage when it can be successfully removed. Cancer can occur at any site or tissue of the body and may involve any type of cells.

In 1995, the south East Asia Region of WHO found that a great majority of cancers of the oral cavity occur in India. These and other international variations in the pattern of oral cancer are attributed to multiple factors such as environmental factors, food habits, life style, genetic factor, or even inadequacy in detection and reporting of cases. Oral cancers are also predominantly environment related and have socio-cultural relationships.

The majority of malignancies arising in oral mucosa are epithelial in origin, approximately 90% being squamous cell carcinomas. Management of oral carcinoma includes early diagnosis, accurate assessment of prognosis, and proper therapeutic intervention. Tumor markers play an important role in all the aspect of management of oral cancer.

Tumor markers are a group of proteins (oncoprotein, immunoglobulin, albumin, globulin), hormones (adrenal corticotropic hormone (ACTH), calcitonin, catecholamines), enzymes (acid phosphatase, alkaline phosphatase, amylase, creatine kinase), receptors (estrogen receptor, progesterone receptor, interleukin-2 receptor, and epidermal growth factor receptor), and other cellular products that are over expressed (produced in higher than normal amounts) by malignant cells. Tumor markers are usually normal cellular constituents that are present at normal or very low levels in the blood of healthy individuals, and the Carcinogenesis (meaning literally, the creation of cancer) is the process by which normal cells are transformed in to cancer cells.

Carcinogenesis is a multistep process resulting from the sequential perturbation of both positive and regulatory networks that normally allow the somatic cell to live a cooperative existence within the society of normal cells that comprise an organism. Normal cells are even programmed to give their own life for the good of the organism. Any genetic or epigenetic changes that allow a cell to escape these societal constraints represent a step toward cancer. Survival of the fittest cells allows for the clonal expansion of progeny cells with ever increasing numbers of genetic or epigenetic changes that favor even greater antisocial and selfish behavior of the cancer cell within the organism. Carcinogenesis is caused by mutation of the genetic material of normal cells, which upsets the normal balance between proliferation and cell death. This results in uncontrolled cell division and tumor formation. The uncontrolled and often rapid proliferation of cells can lead to benign tumors. Some of these types of cells may turn in to malignant tumors.

Tumor Marker & Carcinogenesis, Manjul Tiwari