History. 1  1982 - Company is formed under the name Omega Research, Inc. 2  1989 - System Writer, a trading strategy software application, is launched. 3  1991 - TradeStation, the company's flagship product, is launched. 4  1992 - SuperCharts, a charting and analytics software application, is launched.
The main difference between cancer cells and normal tissue stem cells is that cancer cells are abnormal and present mutations.
The grade of the cancer refers to the appearance of the cells in the tumor and gives an idea of how aggressive the cancer is. Grade 1 cancers are made up mostly of normal-looking cells; grade 2 cancers have more abnormal-looking cells; and grade 3 cancer cells have a higher percentage of abnormal-looking cells.