Malignant categorization

It is suggested that altered cells which could be potentially malignant are recognized by the immune system and eliminated. This must mean that cancer cells possess new antigens on their cell surface. These antigens have been identified and can be categorized into three groups. 

Staging of malignant melanoma is important to determine prognosis, categorize patients with regard to metastatic potential and survival probability, and aid in clinical decision making. 

Ribak J, Lilis R, Suzuki Y, et al. 1991. Death certificate categorization of malignant pleural and peritoneal mesothelioma in a cohort of asbestos insulation workers. J Soc Occup Med 41(3) 137-139. 

Nearly 90% of malignant tumors involving the thyroid are differentiated carcinomas of the follicular epithelium. Based on growth pattern, approximately 75%-80% of these can be categorized as papillary, and 15%-20% as follicular (Fuchshuber et ai, 1998). The majority of these tumors maintain the ability to transport and concentrate iodine, a factor that allows us to use radioisotopes of iodine for both diagnosis and therapy. Differentiated... 

Orel SG, Kay N, Reynolds C, Sullivan DC (1999a) BI-RADS categorization as a predictor of malignancy. Radiology 211 845-850... 

There are various causes of urinary tract obstruction, which are either benign or malignant and can be further categorized based upon the site of obstruction, be it at the pelviureteric junction (PUJ), along the length of the ureter, or at the vesicoureteric junction (VUJ). 

As noted in the previous section, there is an inverse relation between vitamin A intake and overall incidence of malignant disease. This relation has been further developed with respect to individual histologic types of cancer. The epidemiologic studies in the following section have been categorized by site, of... 

This chapter is concerned only with the primary defects in the cellular or humoral immune response. Thus, all hypercatabolic states or those due to exogenous agents, such as irradiation or drugs, are excluded as are im-munodeficient states secondary to malignant processes. The primary immunodeficiencies are categorized in the accompanying tabled... 

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