Cancers can also be named according to their tissue sources. Those originating from epithelial tissues are collectively called "cancer", such as squamous cell carcinoma and adenocarcinoma. Those originating from mesenchymal tissues are called sarcomas, such as leiomyosarcoma and fibrosarcoma. A few tumors are not named according to the above criteria. For example, some malignant tumors originating from mature tissues and neural tissues are called blastomas, such as neuroblastoma, medulloblastoma, nephroblastoma, etc. However, in a few cases, they can be benign, such as myoblastoma, chondroblastoma, and osteoblastoma. Some malignant tumors, due to their complex components or habitual practices, have "malignant" added before their names, such as malignant teratoma, malignant meningioma, malignant schwannoma, etc. Some tumors are named after people, such as Ewing's sarcoma and Hodgkin lymphoma. Or they are named according to the state of tumor cells, such as giant cell tumor of bone and oat cell carcinoma of lung. Why do humans get cancer? Numerous medical researches and clinical experiments have unveiled the face of this devil: the deprivation of electrons in human body cells is the root cause of all diseases. Active oxygen (free radicals ORS) is a substance that lacks electrons (unsaturated electron material). After entering the human body, it strives for electrons everywhere. If it seizes the electrons of cellular protein molecules, it causes proteins to connect with side chains, leading to alkylation and forming mutated molecules that cause cancer. These mutated molecules, due to their own lack of electrons, will then seize the electrons of nearby molecules, causing the adjacent molecules to also mutate and cause cancer. Thus, a vicious cycle creates a large number of mutated protein molecules. When these mutated protein molecules reproduce and replicate, gene mutations occur, forming a large number of cancer cells, eventually resulting in cancer. Cancer conditions are extremely dangerous, and the proliferation and diffusion of cancer cells are very fast, often leaving modern medicine at a loss.
1. Changes in testicles
Testicular cancer frequently occurs in the age group of 20-39 years old. The American Cancer Society recommends that men should check their testicles monthly, including changes in testicle size, obvious swelling or shrinkage, appearance of lumps in the scrotum, feeling of heaviness in the scrotum, etc. Seek medical attention if there are any issues. In particular, if you feel heaviness in the scrotum, as if there is a lump inside, and it lasts for more than a week, you should immediately see a doctor for diagnosis. This is the most typical sign of testicular cancer, requiring blood tests and scrotal ultrasound.
2. Urinary problems
As age increases, urinary problems become more common among men, with frequent urination, urgent urination, or incomplete urination being quite common. If symptoms worsen, especially with a strong sense of urgency during urination, one should be cautious about prostate cancer. Usually, a digital rectal exam is performed, and the doctor will inform you whether there is an enlarged prostate, which is a major symptom of prostate cancer.
3. Abdominal bloating
Many women consider abdominal bloating to be very common and not something to worry about much. However, this could be a symptom of ovarian cancer. Liu Juntian, director of the Center for Cancer Prevention Medicine at Tianjin Tumor Hospital, introduced that persistent abdominal distension, feeling of pressure and pain, gastrointestinal discomfort, difficulty eating or easily feeling full, lasting for several weeks, may be signs of ovarian cancer.
4. Irregular bleeding
Dr. Daley, an American oncologist, stated that abnormal vaginal bleeding between menstrual cycles and bleeding during bowel movements are easily overlooked by women. They may be a major sign of the common gynecological cancer: endometrial cancer. At least three out of four women who experience this symptom are diagnosed with endometrial cancer. Bowel bleeding may be a sign of colon cancer.
5. Unexplained weight loss
It is indeed delightful to lose weight without much effort. However, if within a month, neither physical activity has increased nor diet has been reduced, yet the weight drops by 10%, one should seek medical attention promptly. Rapid weight loss, loss of appetite, repeated diarrhea and constipation are the most common symptoms of lung cancer, stomach cancer, kidney cancer, and colorectal cancer. For women, it may also indicate hyperthyroidism.
6. Persistent abdominal pain accompanied by depression
Dr. Leonard Lichtenfeld of the American Cancer Society stated that if there is persistent abdominal pain accompanied by depressive symptoms, it could likely be pancreatic cancer. Experts have found that depression is highly associated with pancreatic cancer. Other symptoms include jaundice or abnormally gray stools.
7. Fatigue
Generally speaking, feeling fatigued is a sign that cancer has progressed somewhat. However, for leukemia, colon cancer, and stomach cancer, fatigue can be felt even in the early stages of the disease. What is the difference between normal fatigue and cancer-related fatigue? Experts from the American Cancer Society stated that general fatigue dissipates after rest, while cancer-related fatigue remains difficult to improve regardless of how much rest is taken.
8. Persistent coughing
Dr. Ranit Micheli of Georgetown University Medical School stated that if there is a mysterious cough that continues non-stop for more than 3-4 weeks, one should see a doctor promptly, as it may be a sign of lung cancer or throat cancer.
9. Difficulty swallowing
Dr. Lichtenfeld stated that long-term difficulty in swallowing may be a sign of throat cancer, esophageal cancer, and stomach cancer, and X-ray chest radiography or gastroscopy should be conducted as soon as possible. Swallowing difficulty, as introduced by Liu Juntian, normally refers to chest pain behind the sternum and a foreign body sensation in the esophagus when eating. Some people may feel as if there are vegetable leaves, fragments, or rice grains attached to the esophageal wall even without eating, and after swallowing food, they may feel that the food descends slowly or even stays in the esophagus.