Cancer occurs as a result of mutations, or abnormal changes, in the genes responsible for regulating the growth of cells and keeping them healthy. The cells in our bodies replace themselves through an orderly process of cell growth: healthy new cells take over as old ones die out.Cell, in due course of time, gains the ability to keep dividing without control or order, producing more cells just like it and forming a tumor. The breast has developed from cells in the breast due to a malignant tumor. In this paper an attempt is made to find out the peak age of a women getting breast cancer in Chennai by the method of unsupervised questionnaire. We collected the data from 100 patients of Adyar Cancer Institute, Chennai. The following are identified as the symptoms of breast cancer namely breast pain, rash/itching, swelling, skin retraction, nippledischarge, lump, left/right breast large in size.First section gives the details about breast cancer. Section two deals with the concept of RTD matrix. In section three the data being analyzed using RTD matrix. In section four conclusions and suggestions are derived.