What does HE4 measure?
What does HE4 measure?
The HE4 test measures the amount of human epididymis protein 4 in the blood. Significantly elevated concentrations of HE4 are frequently present in the blood of a woman who has epithelial ovarian cancer.
What is the normal level of HE4?
Results. HE4 reference limit for healthy patients equals 85 pmol/l, which becomes 73 pmol/l and 93 pmol/l for pre and postmenopausal subgroups, respectively. There is a statistically significant correlation between HE4 serum level and smoking ( ) and there is no correlation with creatinine.
How accurate is HE4?
The combination of HE4 and CA125 showed sensitivity 75.8%, specificity 93.5%, and accuracy 85.7%.
What is epithelial ovarian cancer?
Epithelial ovarian cancer is the most common type of ovarian cancer. About 90 out of 100 tumours of the ovary (90%) are epithelial. Epithelial ovarian cancer means the cancer started in the surface layer covering the ovary. There are different types of epithelial ovarian cancer.
Is HE4 and CA-125 the same?
HE4 was more sensitive in detecting early stages of ovarian cancer and more specific. HE4 improves the utility of CA125 as a tumor marker in ovarian cancer, and using both markers simultaneously increases the tumor marker sensitivity.
What can elevate HE4?
Increased CA-125 without HE4 elevation is specifically indicative of advanced endometriosis or ovarian endometrioma. On the other hand, elevated HE4 with normal CA-125 may suggest the presence of either ovarian or other types of cancers, including EC [73].
Is HE4 and CA125 the same?
How long is HE4 test?
When HE4 is increased, the HE4 test may… Human epididymis protein 4 (HE4) is a protein that is produced by most, but not all, epithelial ovarian cancer cells. This makes the test useful as a tumor marker in specific circumstances. The HE4 test measures the amount of human epididymis protein 4 in the blood.
What is a HE4 blood test?
How fast does epithelial ovarian cancer grow?
Generally, epithelial ovarian cancer grows rapidly and presents as advanced disease at the time of diagnosis because patients do not experience symptoms in the early stages [3], [4]. However, it generally takes about 3–6 months for a cancer to double in volume [5].
What causes false positive HE4?
For HE4, renal failure was the most common cause of false positive readings. Patients with renal failure also had higher HE4 levels than patients with benign gynaecological conditions. Patients with effusions (not specified), with liver or lung disease also had false positive HE4 readings.
What are the results of the HE4 blood test?
HE4 Blood Test Results Fully Explained. The HE4 blood test is ordered to determine either the recurrence or progression of ovarian cancer. Ovarian cancer can recur in women who have been cancer-free for some time, so this blood test is often part of a recall program where progress is monitored.
Is there a link between HE4 and endometrial cancer?
The structure and methods of detection of HE4 are discussed. Preliminary data show that HE4 may have more potential than cancer antigen 125 in discriminating benign from cancerous ovarian masses, and has the strongest correlation with endometrial cancer of all markers tested to date.
Why does the HE4 blood test show ovarian cancer?
Although ovarian cancer is primarily why the HE4 protein is present, there are other reasons that can be behind the increase as well. Unless a cancer diagnosis has been confirmed, this test is used to determine the possibility that ovarian cancer may be present. Does the HE4 Blood Test Always Detect Cancer?
How big is the nucleus of a helium 4 atom?
The size of the 4 He nucleus has long been known to be in the order of magnitude of 1 fm. In an experiment involving the use of exotic helium atoms where an atomic electron was replaced by a muon, the nucleus size has been estimated to be 1.67824 (83) fm. The nucleus of the helium-4 atom is identical to an alpha particle.
