Tumor markers are unique products of tumor cells and are biochemical substances that indicate the presence of tumors and reflect their biological characteristics. From a clinical point of view, it mainly refers to those tumor-related substances detectable in blood, body fluids and tissues. In recent years, health checkups have received unprecedented attention, and some tumor markers have also been included in health checkups. In fact, the detection of most tumor markers often fails to achieve the purpose of early diagnosis of tumors. Misunderstanding 1: Help early diagnosis of tumor In fact, in addition to AFP for early diagnosis of primary liver cancer, PSA, F-PSA and their ratios contribute to the early diagnosis of prostate cancer. The detection of other tumor markers is not very important for the early diagnosis of tumors. Significance, its clinical value is mainly reflected in the analysis of efficacy, prognosis, prediction of recurrence and metastasis. The early diagnosis of tumors needs more comprehensive analysis based on medical history, symptoms, signs, imaging examinations (B-ultrasound, CT, X-ray, gastroscopy, colonoscopy) and other means to confirm the diagnosis depends on pathological examination. Misunderstanding 2: Negative can exclude related tumors Since the detection of most tumor markers does not have much significance for the early diagnosis of tumors, the negative tumor markers can not completely rule out the relevant tumors. For example, serum CA199 is significantly elevated in the early stage of gastric cancer only when it is infiltrated or lymphatic metastasis. There was a 50-year-old patient with a history of stomach disease for more than 30 years. After two weeks of aggravation, the digestive doctor asked him to have a gastroscopy. He refused because of the recent negative indicators such as CA199 and CA50. After half a year, jaundice appeared, and liver function was not abnormal. Only when he was forced to undergo gastroscopy, he found that gastric cancer had reached the advanced stage and died one month after barely operating. Even a tumor marker with a significant significance for the early diagnosis of primary liver cancer, such as AFP, has a positive rate of only 79% to 90% (the positive threshold for AFP diagnosis of primary liver cancer is >400 ng/ml). That is to say, in patients with 10% to 30% of primary liver cancer, AFP is normal or only mildly elevated. Misunderstanding 3: abnormalities can diagnose related tumors Many benign diseases can have abnormal tumor markers, such as prostatic hypertrophy, prostatitis can have mild to moderate elevation of PSA, endometriosis can have mild to moderate elevation of CA125, acute and chronic liver disease There may be different degrees of increase in CA125, CA199, CA50, and ferritin. Biliary disease with jaundice often has a significant increase in CA199, CA50, and even a long-term smoker CEA will have a slight increase. There was once a simple hepatitis B surface antigen positive person in the age of 50, and its CA199 was always between 50 and 70 u/ml (normal reference value: <37u/ml). There was no other abnormality in the whole body examination. More than enough. All safety-conscious parents lookout for a solution that can track their child`s school bus location in real-time, and that`s where a School Bus GPS Tracking System comes in. Monitor assist system,Vehicle tracking system,,Vehicle remote monitoring system , Vehicle backup camera system,Vehicle driver monitoring system SHENZHEN SANAN TECHNOLOGY CO.,LTD , https://www.sanan-cctv.com
A real-time bus tracking system provides you the live GPS location of the school bus and tells you whether your child has boarded or de-boarded the bus or not, and at what time.
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That`s the whole beauty of a real-time tracking system!
Complete Safety and Security of Kids:
Transportation safety is the primary concern of parents.
The Best school bus tracking system allows school administrators to keep a tab on driver`s speed limits and provides an option to contact your drivers on duty. This gives peace of mind to parents in ensuring the safety and security of their kids.
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