Invasive ductal carcinoma (IDC) is the most common type of breast cancer, accounting for about 80% of all cases. It begins in the milk ducts of the breast and can spread to surrounding tissues. Early detection through mammograms and self-exams is crucial for effective treatment. IDC can vary in its aggressiveness and may present with symptoms such as a lump in the breast or changes in breast shape. Treatment options typically include surgery, radiation therapy, and chemotherapy, depending on the stage and characteristics of the cancer. Regular check-ups are important for monitoring and managing the disease.