Body organs are all made of cells. When cells become abnormal and continue self-proliferation, more and more abnormal cells may transform into cancer cells. Tumors can be classified as benign and malignant. Benign tumors are usually removable and mostly non-recurrent. Most importantly, benign tumors do not migrate to other body parts and thus are not life-threatening. Malignant tumors are cancerous cells, which may interfere, destroy surrounding tissues and organs, and migrate into blood stream and lymphatic system. This is how cancer cells migrate from in situ tumors to other body parts, which is also called metastatic cancer.
The top 10 cancers are: Colon cancer, liver cancer, lung cancer, breast cancer, oral cancer, prostate cancer, gastric cancer, melanoma, esophagus cancer, cervical cancer, and uterine cancer.
| Changes in frequency of urination and passage | Changes in body warts or moles |
| Long-term hard-to-heal wounds | Long-term cough or hoarse voice |
| Abnormal bleeding or secretion | Long-term fever or fatigue with unknown reasons |
| Breast or other body tissues thickness or lump | Weight loss or pain with unknown reasons |
| Indigestion or dysphagia | Persistent pain without improvement at specific body part |
