Preface this is book is the result of the study of breast cancer self-examination in Sudan, village population.Breast Self-Examination (BSE) is a process by which women examine their breasts regularly to detect any abnormal swellings or lumps in order to seek prompt medical attention. It has a role in early detection of the cancer. Moreover, it is convenient and cheap compared with the other screening methods.Aim: This study was conducted to determine knowledge, attitude and practice towards BSE among reproductive age female in Altekaina village, Sudan. Chapter one include some information about breast cancer and self-examination.