Includes Diseases: Adenocarcinoma; Esophageal cancer Click to see full answer. Herein, what is the meaning of TNM staging?TNM staging. The breast cancer TNM staging system is the most common way that doctors stage breast cancer. TNM stands for Tumour, Node, Metastasis. Your scans and tests give some information about the stage of your cancer. But your doctor might not be able to tell you the exact stage until you have surgery.Secondly, how do you do TNM staging? Staging Groups Stage 0 means there’s no cancer, only abnormal cells with the potential to become cancer. Stage I means the cancer is small and only in one area. Stage II and III mean the cancer is larger and has grown into nearby tissues or lymph nodes. Stage IV means the cancer has spread to other parts of your body. Likewise, what does MX mean in cancer staging? MX: Metastasis cannot be measured. M0: Cancer has not spread to other parts of the body. M1: Cancer has spread to other parts of the body.What does t1a mean?T1a means the cancer is 1cm or less at its widest part. T1b means the cancer is between 1cm and 2cm across. T1c means the cancer is between 2 and 3 cm across.