staging categories are important in predicting the prognosis ahead and determine the optimal treatment recommendations. Australia bone cancer treatment Level 0 is DCIS or DCIS. Breast cancer arises from cells, the ducts. If cancer cells still contain within the channel, it is diagnosed as DCIS. This can be determined by a pathologist views the tissue under a microscope. In general, if the DCIS lesion is small, it is not necessary to suspect the cancer spreads outside the breast. Stage 1 invasive or invasive cancer. Here, cancer cells have penetrated the duct wall and off the course found. In this case, doctors need to determine if the cancer has spread to lymph nodes. Phase 1 breast cancer must be equal to or less than 2 cm in invasive component, and did not spread to lymph nodes. Often containing tissue removed during surgery in DCIS plus invasive cancers. But after the dimensions of invasive cancer. If the patient has to have several surgeries and invasive cancer is found in more than one operation, usually the dimensions together, taken to reach the final size. Level 2 has two sub-categories. In stage 2A, invasive cancer is 2 cm or less and must axillary (armpit spread) node (s), ie positive node (s). In addition, invasive cancer may be as large as 5 cm, but not in the lymph nodes, i. E. nodes negative difference. In Phase 2b, invasive cancer between 2 cm to 5 cm and has spread to lymph nodes. The cancer can grow more than 5 cm, if it does not spread to the node. Secrets revealed lung cancer Click here Level 3 with invasive cancer by more than 5 cm, has spread to lymph nodes. In addition, cancer of all sizes, including much of the axillary lymph nodes to the point that these are large and glued or pinned to other structures in the axilla (armpit), at this point. Tumor spread to lymph nodes above or below the clavicle bone or lymph nodes under the breastbone (sternum), also falls into this category. In addition, when cancer of any size with chest wall (pectoral muscle and / or ribs) is fixed, it does qualify as a Level 3 inflammatory breast cancer where the skin is red and swollen , is classified in this stage, whatever their size. Level 4 is an invasive breast cancer and outside the axillary lymph nodes, or “metastasis” located in remote locations. At this stage it does not matter the size of primary breast cancer. Nor does either axillary / subclavian / sternal lymph nodes have cancer or not. The most common sites of metastasis of breast cancer, bone and liver, followed by lung and brain. Standard tests include bone scans and CT of the thorax, abdomen and pelvis. More recently, PET is often performed to find the cancer spreading. Sometimes an MRI or CT is also useful. advanced lung cancer Click here