staging and grading of cancer
Staging and Grading of Cancer
Prognosis of cancer varies according to the stage of the cancer. Staging and grading of cancer helps determine the course of the treatment. Go through this article to know the terms that are used to describe the stage and grade of a cancer.
- Myeloma- cancer originated in the bone marrow
- Sarcoma-originated in the connective or supportive tissue (e.g., bone, cartilage, muscle)
- Carcinoma-origin in the epithelial tissue (i.e., tissue that lines organs and tubes)
- Adenocarcinoma-originated in the glandular tissues
- Blastoma-originated in the embryonic tissue of organs
- Lymphoma-origin in the lymphatic tissue
- Leukemia-cancer initially developed in the tissues that form blood cells
- Grade 1: Cells are slightly abnormal and are well differentiated.
- Grade 2: Cells are more abnormal and are moderately differentiated.
- Grade 3: Cells are highly abnormal and are poorly differentiated.
- Grade 4: Cells immature and undifferentiated.
- Stage 0: This stage is also called 'carcinoma in situ'. For example, some abnormal cells which are likely to turn cancerous are detected in the Pap smear test. Pap smear test has helped increase the survival rate of cervical cancer in women significantly, over the last few decades.
- Stage I: Cancer is confined to one part (its origin) of the body.
- Stage II: Cancer spreads locally.
- Stage III: Extensive local and/or regional spread of cancer. The specific criteria for Stages II and III may vary according to the type of cancer. Cancer affecting the lymph nodes, cancer invading lymph nodes on only one side, or invading the lymph nodes on both sides, etc. are reported as stage II and stage III, depending upon the type of cancer.
- Stage IV: Metastasized cancer. Cancer has spread into other distant organ(s) or throughout the body.
- T0 indicates no evidence of tumor
- Tis stands for carcinoma in situ (abnormality limited to surface cells)
- T1 to 4 indicates smaller/larger size of the tumor and whether it has gone deep into the skin or surrounding tissue.
- N0 indicates nearby lymph nodes are not invaded by cancer.
- N1 to 4 stand for degree of lymph node invasion (how many lymph nodes are invaded).
- TX and NX indicate tumors cannot be assessed or lymph node invasion cannot be assessed.
- M0 shows no evidence of distant metastases.
- M1 indicates distant metastases.